While on Air Force One, a Navy Commander dies. Agents from the Navy NCIS decide to take the investigation into their own hands and also force a Secret Service Agent Kate Todd to help. Now the NCIS team has to figure out if the Navy Officer's death was of natural causes or not.
During a training exercise, a marine's parachute fails to open and he crashes into a parked car where two teenagers were making out. The NCIS team heads to the scene and has to determine if the marine's death was accidental or a murder.
When a Navy commander's body washes up on shore along with the bodies of two drug runners, Gibbs refuses to believe that the sailor who was killed, was dirty.
The NCIS team investigates when a seaman's body is found at the bottom of the sea in his dress whites, with a ceremonial sword. They discover that he was addicted to a Wizards and Warriors style role-playing game. Now, the team must figure out how involved he was in the game and how far he would go to get revenge on his arch enemy, another sailor.
A Navy lieutenant who was reported missing nearly ten years ago has been found by a deer hunter. When the NCIS team arrives at the scene to investigate, they see that his remains have been mummified. Now, they have to find out what happened to him and what happened to the one million dollars that he had on his ship.
An NCIS agent who used to work under Gibbs asks for the team's help investigating a case where sailors on an aircraft carrier are dying of a drug overdose, but have no history of any kind of drug abuse.
A decomposed body is discovered in a tub of acid at a naval base and Ducky and Abby learn that the victim was a submariner. Gibbs discovers that there have been no reports of a sub crewmember missing, so he deduces that one of the subs has an imposter on board. With this new information, the team must find out which sub the man posing as the victim is in and what intentions he may have towards the sub.
The NCIS team head to Cuba to investigate a Navy translator's connection to smuggling at a detention center after he suddenly dies at the wheel of his car when returning to the U.S. from Guantanamo Bay.
After a marine widow receives a call from her dead husband, the NCIS team takes on the case and has to exhume the body to deduce whether the call was a prank or not.
After being buried alive, a woman comes out of the grave with amnesia and the only thing she remembers is that there is a bomb aboard a Navy ship. While trying to help Jane Doe recover her identity, the team finds out that not everything is what it seemed at first.
When a Navy commander, who was a technical advisor to a civilian contractor for a Navy weapon, is found dead on the beach, the NCIS team investigates the murder using satellite technology.
The NCIS team is called in when a severed leg bearing a marine tattoo is found in a trash bin, leading them to a small town where a murder scheme is afoot.
The team investigates when a Marine recruitment officer is found shot to death by a sniper with a grudge, who leaves a white feather behind.
A navy dentist stops near the parked car to help a stranded motorist who pulls out a gun. The team investigates a murder with the help from a local sheriff, Charley, when they find out about a the similar murder of the Navy civilian employee in the was going through the nasty divorce,the wife is suspected but her alibi is perfect.
Gibbs risks his career when his former commanding officer is accused of stealing the funds.
A terrorist holds Ducky, Gerald, and Kate hostage while NCIS investigate how exactly the terror organization member got a job at the navy base.
When the body of a marine is found after a party in an illegal night club, the team investigates a number of possible leads - including blackmail and accidental death.
The team is looking for an ex-SEAL who escaped from prison in search of revenge. He is decisive to find the real murderer of his wife.
Gibbs and his team are called to investigate when a fellow NCIS agent is found murdered. When NCIS Special Agent Pacci is found brutally murdered, Gibbs and his team reconstruct a cold case Pacci was working on at the time of his death. The case involves the theft of millions of dollars from a Navy lieutenant who was later allegedly killed in a car crash. With the money never recovered, the clues all point to one woman close to the case who has her own startling secret.
A marine goes missing after a date with a reporter. During the investigation, the team discovers that three former members of his unit are dead and suspect the unit commander to be a serial killer.
When a Marine is found impaled on a tree stump, Gibbs and his team begins a search for the weapon and the murderer. The case leads them to a pawn shop known to deal in stolen military weapons where they discover an undercover ATF agent Melinda (guest star Bellamy Young) who’s also hoping to also crack the case. Gibbs brings her into his scheme to meet with a local militia leader looking to buy illegal weapons, but when the plan goes awry, it is revealed Melinda is not who she seems to be.
From TV Guide Online: Gibbs' team investigates the death of a SEAL during a training exercise, and come to suspect that it wasn't an accident, but a murder.
The terrorist from Bette Noir returns with a plan to attack the President. Gibbs and his team follow the clues to reveal his identity and find Kate who is kidnapped.
When the wife and 9-year-old blind daughter of a Navy captain are kidnapped, Gibbs and his team are faced with a unique challenge. Gibbs and his team are called into an uneasy situation when a Navy captain's wife and 9-year-old blind daughter are kidnapped from their home. The kidnapper, who is demanding $2 million in government funds, is also holding the captain hostage in his own office via webcam. Gibbs devises a plan to plant listening devices in the office and then takes a huge risk by instructing the Captain to demand the kidnapper show a gesture of good faith by releasing his daughter before he completes the money transfer. Meanwhile, Abby and McGee use their computer skills to hack into the kidnapper's computer and trace his whereabouts.
The NCIS team is called in to investigate when the decomposed body of a woman in a wedding dress is found in a cell beneath abandoned military housing.
As Gibbs and his team investigate the bizarre discovery of the woman in a subterranean prison cell made to resemble a 1950's bedroom, the evidence indicates that she had been imprisoned for months and died when her air supply was cut off. Subsequent evidence indicates that this murder may be only one in a pattern of similar incidents and Gibbs and the team find themselves racing to find another possible victim who disappeared from a Navy base in Florida.
The NCIS team is called in to investigate when a perfectly functioning Marine helicopter is found in the middle of a crop circle.
The first job for Gibbs and the team is to find the two pilots missing from the Marine Cobra helicopter. After locating the co-pilot, who thought their scheduled training flight had been canceled, the team continues its search for the pilot amid reports from nearby town people who say they saw strange lights the night the chopper landed. While many, including Abby, are convinced the area has been visited by aliens, Gibbs discovers the truth lies in the town's secret history.
The NCIS team is called in to investigate when a body dressed as a Navy lieutenant is discovered apparently raped and murdered.
Gibbs notices Ducky acting uncharacteristically abrasive and secretive after inspecting the body. When Ducky confirms his fears, he reveals to the team he has found physical evidence linking the death to a similar unsolved murder that has been haunting him for 10 years.
A body found on a Marine firing range leads the team to discover a Mafia dumping ground.
When a civilian’s body is found on a Marine bombing range, Gibbs and his team uncover the disturbing news that the area has been dumping ground for the Mafia for years. The team quickly discovers that their victim is actually an undercover FBI agent and that Gibbs’ FBI counterpart, Agent Fornell (guest star Joe Spano), is being imprisoned, accused of acting as a mole who has been feeding sensitive information to the local Mafia boss. Fornell denies the allegations and Gibbs sets out to expose the real spy.
The NCIS team protects an Iraqi War veteran who is the target of terrorist threats.
Gibbs observes the strained relations among family members as the team tries to convince a tough and unyielding FBI agent, Lina Reyes (guest star Elizabeth Pena), to let them participate in the investigation. Just when the NCIS team thinks they have identified the bomber, another attempt is made on the pilot's life and it's clear there's more to these attempts than terrorism.
Gibbs and his team must clear the name of an elderly Marine who confesses to murdering his best friend nearly 60 years ago.
An elderly Medal of Honor recipient, Ernie Yost (guest star Charles Durning), shows up at NCIS headquarters and confesses to murdering his best friend during a battle at Iwo Jima almost 60 years ago. Gibbs’ gut tells him there is more to the story and, with the help of his team who are captivated by the warmth of the honored veteran, they work to solve the mystery and keep Yost from going to prison and losing his Medal of Honor.
Gibbs and his team are summoned to examine the mysterious death of a Navy commander who, after successful open heart surgery, seemingly bursts into flames.
The NCIS team discovers that the commander made an art out of making enemies and they track down a young ensign who was relentlessly hounded by the deceased. But as they take him into custody, a scuffle takes place and Kate reacts with fatal results, realizing too late that they have the wrong man. Ultimately, Tony and Ducky combine their knowledge to uncover the person responsible for the commander’s death.
Gibbs and his team are called to the scene when a Marine's wife shoots an intruder who tried to rape her.
Gibbs and his team discover that while Laura Rowen's (guest star Megan Ward) husband serves overseas, she leads a secret life. The NCIS team tracks a trail of her e-mails to a torrid website, which indicates she may have lured the attacker to her home under false pretenses. As the investigation progresses, the team discovers that they have a serial rapist and killer on the loose who uses websites to stalk his prey.
The team must work together to find Tony when he disappears during an undercover operation.
Tony goes undercover as an escaped prisoner chained to a convict who holds the key to the recovery of stolen ancient Iraqi art and sculpture worth millions of dollars. But when the GPS locator Abby planted on Tony becomes inoperable, Gibbs and the team must work quickly to find him by using other methods since Tony is unaware that the thief may be a dangerous killer.
The NCIS team investigates when the body of a naval officer missing for 2 years turns up on the bottom of a lake.
Gibbs and the NCIS team reluctantly allow the notorious private detective, who located the body, to assist in the investigation as long as he shares information. Fueling the search for the missing man is a one million dollar reward posted by his wealthy family. But when a bullet is found in the car, the missing persons' case turns into murder.
The NCIS team investigates the possible murder of a petty officer that was reported by a telemarketer who heard it over the phone.
When a telemarketer reports the possible murder of a petty officer he was soliciting, Gibbs and the team work together with the local Virginia officials, whose traits are remarkably like those of the NCIS team. Using their computer skills, Abby and McGee quickly discover that the “attack” was a hoax, intentionally staged by the officer. But when the missing petty officer’s body is found, Gibbs’ investigation takes on a whole new angle.
As he reassembles the pieces of three bodies found stuffed in barrels months ago, Ducky is shocked when he discovers their identities.
Gibbs and the team step into high gear when Ducky realizes the bodies are those of a prosecutor and sheriff who worked on a rape and murder case with Ducky 10 years before. Ever suspicious, Gibbs feels that Ducky could be the next target of the mysterious killer because of his part in the original case, so he assigns the team the task of guarding Ducky and his senile mother. But when Ducky is kidnapped during the team's watch, Gibbs races against time to save Ducky and capture the demented killer.
Gibbs gives McGee a shot at running a case when the NCIS team is called to investigate when a woman claims to have witnessed the murder of a sailor.
With skimpy evidence to go on, Gibbs turns the case over to McGee, who believes the woman's story is enough to continue the case. But when physical evidence of a crime isn't there, McGee pushes the team to keep looking because he senses there's more to her story than meets the eye.
The NCIS team investigates when a Marine records his own murder on video as he falls off a cliff.
Gibbs and the team are called in when a Marine is discovered dead at the bottom of a cliff during a camping trip with his wife and best friend, who had an affair. Gibbs plays the former lovers against each other during the interrogation, hoping to get one to say the other is guilty. Meanwhile, Abby must put her superb technical skills to the test when she reconstructs the camera that was broken during the Marine's fall. Also, McGee gets himself into a very "itchy" situation while investigating the campground.
The NCIS team investigates the bizarre death of a female petty officer who is found brutally murdered in the bed of a dance club bartender.
Gibbs and the team are perplexed when a dance club bartender wakes up to find the woman next to him is not only dead but not the woman he went to bed with. The NCIS investigation leads the team to her sister, Jade (guest star Mya) who is a singer in the bartender's rival dance club.
The NCIS team investigates when a pair of 'cobalt blue' eyeballs are sent to a petty officer in D.C. in a package from Paraguay.
The investigation puts Gibbs and the team on the trail of a former Navy Intelligence agent who is now a private contractor working in Paraguay. With a little help, Gibbs learns the rogue agent is involved in illegal activities and sends Tony and Kate to Paraguay to make an arrest.
The NCIS team investigates when a petty officer who recently returned from duty is found dead backstage at a local bikini contest.
Gibbs and the team trace the Petty Officer's activities since returning from sea duty and they discover a possible stalker who had just been released from prison. But when his location is accounted for at the time of the murder and Ducky's autopsy reveals the Petty Officer was pregnant, the team discovers that jealousy may be the motive for her death.
The NCIS team investigates when a Petty Officer commits suicide after being institutionalized for a nervous breakdown.
Gibbs and the team are stunned when Ducky tells them that the Petty Officer, who claimed to have a stalker, was in fact murdered and did not commit suicide. With the help of FBI Agent Fornell (guest star Joe Spano), the team’s investigation reveals the Petty Officer was a victim of a twisted love triangle involving her C.O., who was being investigated by the FBI for kickbacks received from Navy contractors.
Gibbs and the team head back to school when a Marine in an ROTC program is found murdered on a college campus.
When the NCIS team begins their investigation, they quickly turn up a suspect but when he is later found murdered, the team is back at square one. Abby and McGee discover an email chain on one of the suspect's computers referencing a mysterious "Red Cell." Gibbs and the team discovers that the possible motive may have been a game with deadly consequences.
Gibbs and the team work to clear the name of a Navy medic killed in Iraq, who is the prime suspect in a murder in his hometown.
After a corpsman, whose actions in combat saved several lives, is killed in the line of duty, the body of a young woman who disappeared before he enlisted is found dead in a storage locker amid his possessions. Local police are convinced the corpsman is responsible for the woman's murder, but Gibbs thinks otherwise and is determined to clear the young man's name.
When a letter sealed with a kiss is delivered to NCIS, Tony assumes it's for him and opens it, only to release a mysterious powder into the NCIS squad room.
Gibbs and the team are forced into quarantine in the NCIS autopsy room pending the results of tests to identify the strange powder. As Abby discovers the substance is a genetically altered version of the plague, Tony and Kate are placed in a bio-hazard isolation ward for fear of exposure. In the clear of the deadly virus, Gibbs and McGee race to track down who sent the letter before the deadly plague destroys one of their team members.
NCIS will pay the ultimate price when a hunt for a terrorist assassination team turns deadly for one NCIS team member, on the second season finale of NCIS.
Gibbs' worst fears are confirmed when he learns that his nemesis, Arab/Israeli double agent Ari (Martin), is back in Washington D.C. on assignment to kill him. Ultimately, the NCIS team discovers that Ari has a bigger plot… and they end up paying the ultimate price trying to thwart it -- the death of a team member.
While the NCIS team deals with Kate's death, Gibbs' determination to finally put an end to Ari's (guest star Rudolf Martin) reign of terror mounts, on the third season premiere of NCIS.
Though he has no concrete evidence that the sniper was Ari, Gibbs is haunted by the thought that the bullet that killed Kate was meant for him. As the team works to collect all the evidence they can in an effort to stop Ari, each of them is forced to confront their emotions about Kate's violent death. Meanwhile, the director of NCIS informs Gibbs he will be leaving to take on a new position and introduces him to his new boss, Jenny Shepard (Lauren Holly), a woman with whom Gibbs has a sordid past.
Ari (guest start Rudolf Martin) continues to wreak havoc on the NCIS team as he uses its members as pawns in the game he is playing with Gibbs.
Gibbs, who is still haunted by images of Kate's death, is determined to stop Ari after he and Director Shepard are the target of sniper fire and Ducky is lured out of the NCIS headquarters by the terrorist. Though Gibbs is still uncertain of Ziva's connection to Ari, she becomes an invaluable asset when Gibbs finally comes face to face with his arch nemesis.
Gibbs is ordered to meet with a convicted serial killer three days away from his execution in order to find out crucial information before he dies.
Under order from the Governor of Virginia, a skeptical Gibbs is forced to meet with a serial killer he helped to convict a decade before under the pretense that the killer will tell Gibbs where he hid missing bodies and give closure to the families before his death. Gibbs' instinct is correct when the killer is coy and doesn't reveal what he promised. Nonetheless, Gibbs has an NCIS team in place to re-investigate the possible locations of the victims. When a crucial piece of information is discovered, Abby and McGee use their expertise to attempt to pinpoint where the bodies might be.
Gibbs and the team are called in when a recently deceased man is found encased in a Civil War-era tomb.
Gibbs and the team discover that the corpse inside the cast-iron tomb is that of a missing Staff Sergeant who, according to Ducky, was buried alive. Using cell phone records from a phone found inside the casket, Abby tracks the victim's final phone calls to a bank and safety deposit box that contains a map the Staff Sergeant died protecting. Meanwhile, Director Shepard informs Gibbs that Agent David will now be a full-time member of his team.
The NCIS team is called in when a Petty Officer is brutally gunned down on the freeway.
As the investigation unfolds, Gibbs and the team discover that the Petty Officer had been living a double life and had switched identities with a former colleague whose job of illegal transporting gives the team their first lead to the murderer. But the break in the case is short-lived when Abby uncovers a message the Petty Office left before dying that leads them in an entirely different direction.
Gibbs and the team investigate the murder of Marine's wife that appears to have been broadcast over the Internet, on NCIS.
The NCIS team discovers that two bored housewives, whose husbands are serving in Iraq, have been running an Internet sex site from their bedrooms. With both women now missing and an Internet file of what appears to be a murder, Gibbs and the team decide to track down the webmaster and follow the money in order to locate the murderer.
Gibbs and the team investigate when a 6-year-old boy informs NCIS his father has been kidnapped.
Gibbs quickly develops a unique bond with the young boy whose missing father is a Lt. Commander working as the Navy's liaison with a defense contractor on a highly confidential project called "Honor." The NCIS team discovers that the top-secret program, for which the missing Commander holds the only code, has been hacked and classified data has been removed. As the evidence begins to indicate the kidnapping may be a hoax, Gibbs holds his ground when his gut tells him the Lt. Commander is innocent.
When the bodies of two assassins are delivered to NCIS from overseas, Tony and Ziva assume their identities undercover and engage in a sexy rendezvous at a luxury hotel in order to find their target.
The NCIS team rallies to clear his name when Tony is accused of murder.
When a portion of a female body is found at Quantico, the NCIS team investigates and is shocked to discover that all the forensic evidence points to Tony as the prime suspect. As Abby questions her faith in her science and her ability as a specialist, she makes it her personal mission to prove Tony's innocence and find out who is trying to frame him for murder before it's too late.
When McGee kills a man while on assignment, the NCIS team steps in to back him when they discover the man was an undercover police officer.
Gibbs is furious when Director Shepard overrules him and allows the police to run their own investigation on McGee. Determined to clear McGee's name and prove his actions were justified, the NCIS team bands together to protect one of their own. Meanwhile, Tony gets a troublesome phone call from his past.
Gibbs and the team investigate the murder of a supermodel filming a reality TV show on a Marine base.
At the start of the investigation, the team believes the model may have committed suicide, but they uncover a twisted love triangle involving the Marine staff sergeant working on "Boot Camp Babes," a drug addicted ex-boyfriend and a disgruntled adoptive father, who is also the executive producer of the reality show. Meanwhile, Director Shepard is annoyed when Gibbs doesn't show up at an awards ceremony where he is being honored.
While searching a Senegalese ship that they believe is being used to smuggle small arms, Tony and Ziva are captured and locked in a container while the team tries to discover their whereabouts.
Gibbs and the team are called in on a weekend when a Navy Lt. Commander in charge of a shipment of nuclear weapons is apparently abducted.
The team works to piece together the Lt. Commander's location by tracking a distress call she made from her cell phone. Believing her captors have abducted the Lt. Commander to commandeer the nuclear shipment, NCIS must move quickly to find the missing woman and protect the classified location of the weapons.
When the wives of two Marines are murdered, Gibbs and the team are called in to investigate. While investigating, Gibbs and the team fear the murders are racially motivated. The team works together to find the killer and protect another woman and her newborn baby who they fear are the next targets.
When NCIS busts an automobile chop shop run by Navy enlisted men, then discover a cooler containing a human head in the trunk of one of the stolen cars. The investigation is hampered by a secretive corporation that has swathed itself in layers of insular legal obfuscation.
Two civilian EMT's are transporting a Marine who died in a car crash but their vehicle erupts in flames when they start driving. The Marine's girlfriend who was in the car with him is still unconscious in the hospital. In the hospital Gibbs and the team meet the Marine's best friend, who may know what really happened.
A Park Ranger is taking a group of Boyscouts around Shenendoah National Park, when they stumble upon bear droppings. One of the Scouts pokes around in it, to discover what the bear ate. Instead, he finds dog tags. A search for the remains of a dead Petty Officer ensues.
Somehow the NCIS team is called to the scene of a High School where a teenager with a bomb is holding some kids hostage. One of the kids is in need of her inhaler for her asthma, and another student stands up for her. When she goes to the lockers to get it, she's able to tell Gibbs what's going on inside.
A Marine is found dead under the ice of a small pond. He was involved with helping kids get out of street gangs and join the Marines. The team gets to work on finding out who was the killer.
A member of a Department of Defense Crypto unit is found dead, when she was supposed to go in and get interviewed by Gibbs. Gibbs was investigating the unit on suspicion of information leaks to a foreign country. The dead female's roommate and their commander seem shaken up when they learn of her death. Gibbs and the team investigate.
An older couple is checking into off-base Navy lodging, but when they enter they are shocked to find a gruesome scene. The clerk is immediately under suspicion. We'll also meet Abby's former boyfriend, who's also a goth and runs a crime scene cleanup company.
Tony and Ziva are coming into NCIS headquarters with $5 million and a drugdealer suspect, who dies in the elevator ride up. His brother wants his cash and brother back, but doesn't know he died. When NCIS is not giving in to his demands, he takes extreme measures.
The NCIS is distressed when Gibbs is injured in a terrorist explosion while on assignment. As the team attempts to put their feelings about Gibbs' injury aside and work on the investigation, Tony steps into the role of senior agent, causing a bit of resentment from other team members. Meanwhile, while recovering, Gibbs is flooded with memories of his past that he had long struggled to suppress.
While Gibbs recovers from an injury caused by a bomb explosion, he experiences temporary memory loss, while his team tries to stop a terrorist group from carrying out a devastating attack on the Navy.
As the team tries to track down the terrorists behind the bombing that injured Gibbs, they learn that the terrorist group is planning another bombing of 9-11 magnitude -- and that Gibbs has information about their plan. Meanwhile, Gibbs receives a visit from his former boss and mentor that conjures up suppressed memories. As Gibbs regains his memory, he finds himself on a race against the clock to fill in the gaps and stop the terrorists.
With Gibbs retired and boat-building in Mexico, the NCIS team must learn to work without him. As each team member deals with the absence of Gibbs in their own way, Ziva's past comes back to haunt her when she inadvertently witnesses an assassination of a military attache by her former Mossad partner. Convinced her father ordered the hit, Ziva seeks refuge at the Israeli Embassy. As the NCIS team, now headed by Tony, works to prove her innocence, Ziva reaches out to the one person she has always been able to trust.
A man brought to justice by Gibbs and Fornell manages to escape from prison and manages to make his way to Fornell, to ask him to reopen his case. Fornell is not amused, as he has his little daughter with him at the time. Gibbs is persuaded to come out of retirement once again to help out. The team ask around old accomplices and people the fugitive knew before he went to jail.
A female Navy Lieutenant goes missing when she's attempting to speed-date. Ziva goes undercover at such an event to find out more, and if they can catch the perp. Gibbs sports some facial hair. Ducky is busy profiling the profiles the Lieutenant made before the dating event. Ziva soon finds a possible perp, but it seems other people are involved.
Two Washington Metro cops pull over a guy who was talking on his cellphone while driving. When approaching the drive, they see a gun under the car seat. Just when they have the guy handcuffed, a car crashes into the police cruiser. Turns out the dead guy in the car is a retired Navy Petty Officer. Gibbs calls Mike Franks when they start investigating.
The NCIS team is called to investigate when a real estate agent finds the body of a missing Lance Corporal is found in a vacant house. At the scene of the crime, Gibbs and the team discover that the Lance Corporal was buried in the backyard and then exhumed. After determining his identity, they learn the Marine, who was deployed to Iraq but never showed up for duty, had two fiances. Abby uses her technical knowledge to run DNA samples from the two women and soil from the grave while Ducky uses his newly obtained Masters in forensic psychology to help NCIS implicate the killer.
Gibbs and his team are called in when a marine has been attacked at his home and his daughter appears to have been kidnapped.
A Marine Colonel is killed on a military golf course, leading the NCIS team to pair up with the Army Criminal Investigative Unit in order to find the killer. After the CIA receives a tip about an abandoned warehouse rigged to explode, McGee uses his computer knowledge to get into the CIA informant database to uncover the terrorist cell.
When suspicious activity surrounds the death of a decorated Marine veteran, the NCIS team works to clear his name. The NCIS team investigates when an honored Marine veteran falls to his death at a hotel. After quickly determining his death was not a suicide, the NCIS team discovers that the Marine was homeless but living at the hotel with the help of a maintenance man who was a fellow vet. But when compromising evidence is found in the Marine's room, Gibbs becomes determined to clear his name and prove his innocence.
Forgoing NCIS procedure, McGee risks his career when he takes matters into his own hands after his sister appears at his door bloodied and confused. As McGee struggles to piece together his sister's whereabouts the night before, he discovers that the NCIS team is investigating the murder of a Navy sailor who had a previous relationship with his sister. Meanwhile, as separate clandestine romantic relationships bloom for both Abby and Tony, the NCIS team discovers McGee has a secret of his own.
When a burnt and mummified body is found at a Marine base NCIS is called in. They identify the remains as a serial killer which means they now have to work with the FBI.
The whole team has to attend sexual harassment classes. They're having a bit of fun with it until they are notified of a dead Navy Lieutenant involved in a research project. Seems like someone among the scientists was not too happy with the whole situation involving a robot-driven humvee.
When a Marine Lieutenant from Saudi Arabian descent is murdered in a hotel room in a small town, NCIS is called in to investigate. However, the local Sheriff's department already cleaned up the crime scene and an autopsy was performed. Involved in this case are an Iraqi who was relocated to the US for providing intelligence and some locals.
The team must find a terrorist who has a missing, toxic chemical weapon in their possession. After 10 kilograms of toxic chemicals go missing, Gibbs and the team must race against the clock to find it before it is too late. The team is shocked when they discover that the weapon is in the possession of Mamoun Sharif, a wanted terrorist.
Ducky is taken out of the autopsy room and put undercover in order to help stop the illegal sale of the Navy's weapons system. When the team captures one international arms dealer, the team learns the weapons system is about to be sold to a dealer known as La Grenouille. With Ducky as a decoy, Gibbs is able to set up a meeting La Grenouille. However, right before NCIS makes their move, they learn another agency has plans for La Grenouille as well.
Working with the local officials, the NCIS team originally believes that the sailor died of an unintentional drug overdose. But when they uncover a mysterious laminated card, Abby discovers an ominous message written on it in blood that quickly makes the team switch gears to find the sailor's murderer. Meanwhile, Tony bonds with one of the local detectives working on the case.
The NCIS team suspects foul play when a Navy Lieutenant is the victim of radiation poisoning.
Gibbs and the team collaborate with the ailing Lieutenant, who is an inspector for the International Atomic Engery Agency (IAEA), as they recreate his routine in an effort to figure out when the contamination took place. Gibbs is convinced that whoever is responsible for poisoning the Lieutenant was trying to ensure that his next scheduled inspection would not happen. But when the dying man insists that only his two closest colleagues knew of the upcoming trip, the team works to find the culprit. Meanwhile, Tony is surprised when he sees a softer side of Ziva.
Gibbs and the team look for a potential serial killer when an explosion at a military cemetery mausoleum reveals a cache of dismembered human remains.
When Ducky and Abby confirm that they have identified the remains of at least five people, the NCIS team immediately begins notifying the families in the hopes of making some connection between the seemingly random selection of victims. But when the suspects are narrowed down, even Gibbs is surprised with the final outcome. Meanwhile, Abby turns to Gibbs with a personal problem.
The team investigates when a Marine, who was thought to have frozen to death, wakes up o Ducky's autopsy table. With the Marine on life support, the team must follow his steps days before he was left to die.
The team learn a tip about terrorist activity was false and resulted in the death of two agents. Agent Cassidy, feeling guilty over the deaths, works with NCIS to track down the people who made the tip.
McGee is shocked when an officer he based his book on is found murdered. With few leads, the team forces McGee to find out everyone who has had access to his secret manuscript.
Director Shepard risks his life and agrees to meet an informant alone, but the meeting takes a turn for the worst and her contact is killed. Gibbs and NCIS try to gather the information the man was about to supply.
A blind photographer inadvertently films the murder of a petty officer. With little evidence, the team has Scott re-create the scene of the crime. Meanwhile, both Tony and Gibbs struggle with their relationship problems.
Gibbs puts off his paperwork for his "acting" director duties in order to lead an investigation into a murder victim found in a taxi headed for NCIS. Meanwhile, Jenny uncovers a secret about her past.
When the NCIS Director returns from Europe, Gibbs and the team prepare for Homeland Security polygraph tests. This leads to tight secrets among the team to be exposed and reveals the biggest secret in NCIS history. To make matters worse, DiNozzo and his girlfriend are held captive by a drug dealer.
The NCIS team and an arms dealer confront in a final showdown that results in an explosive and deadly ending.
During an autopsy, Ducky comes across a discovery that spurs on a search for a missing child. Meanwhile, Tony faces his feelings for Jeanne.
Gibbs and Mann team up for the investigation into a Marine Captain who had access to classified information. Things becomes increasingly complex when one of the witnesses is the man's ex-wife.
Gibbs and his team identify a body labeled as a "John Doe" as a felon known for erasing pasts.
The NCIS team is called when a naval officer threatens to jump off of a rooftop. Soon the attempted suicide turns into a murder investigation.
The team investigates a mysterious death on a top-secret research ship. They soon uncover a deadly secret that could threaten their lives as well.
Gibbs helps an old friend who is still coping with the death of his daughter who died 15 years earlier. As they investigate, Gibbs stumbles across a shocking conclusion to her death.
The NCIS team looks into the assassination of a Navy Admiral. The case takes a shocking turn when they encounter a woman searching for her husband, a refugee from Africa.
The team watches over a 9-year-old boy whose father is a wanted man. Their search for the boy's father leads them into the wilderness where they uncover the truth about the man's past.
The team is assigned to find a Marine who thinks he's still in Iraq. Following a violent encounter, the NCIS team learns that the man is part of a top-secret experiment.
An investigation ensues when a Muslim Marine is found dead near a mosque. Out of respect for the families beliefs, Ducky refuses to perform an autopsy.
When naval radar goes missing, NCIS stakes out a warehouse to catch the thief. However, plans change when the team witnesses a murder instead.
When the team looks into a fatal dog mauling, Abby risks her career to prove the dog is innocent. Meanwhile, Gibbs begins to get closer to the secret Jenny is keeping.
When the body of an arms dealer surfaces, the team is put under FBI investigation for his murder and Jenny Shepard becomes their number one suspect.
After a mortar attack in Baghdad is ruled a murder, two NCIS members are sent into the heart of Iraq to handle the investigation.
While on assignment undercover, Ziva's task takes a shocking turn for the worst when the serial killer the team is tracking becomes suspicious of her.
Palmer becomes the main target of a mysterious killer who he recognizes as a person from his past.
A search for the killer of one of their own puts all the agents at risk.
The team continues to race against the clock as they hunt for the killer who took the life of one of their own.
"Last Man Standing" - The murder of a Naval Petty Officer leads Gibbs to uncover a shocking connection between the case and Director Vance's decision to disband his team!!!
While stationed on an aircraft carrier, DiNozzo finds that a Navy Lieutenant's apparent suicide may be connected to a larger, deadly scheme.
When a young female Lieutenant Commander's body is discovered, shot in the back, suspicion falls ona prominent U.S. Senator who served in the Marines with Gibbs.
A Marine gets in a brawl inside a bar. When the bouncers kick him out, he finds two Marine buddies barely breathing between the trash cans. One doesn't survive and the team is called in to investigate. Gibbs goes back to his home town, where we meet his father.
The hunt for a marine's murderer puts Gibbs on a collision course with an old friend FBI Agent Fornell.
Gibbs and his team are search for a cyber serial killer who takes videos from his victims. The team quickly finds out that the video's of the dead victims are false.
Director Vance shakes hand of a young female NCIS special agent, who has just received a citation.
NCIS has to do the investigation of a deadly bank robbery. One of the new recruits assigned to the fraud unit, special agent Dwayne Wilson joins the team to help.
A shocking revelation comes to light after the team is forced into playing a dangerous war game.
The team must rely on information from some questionable individuals to stop a criminal bent on stealing government secrets.
After a petty officer dies in a car crash, the team suspects foul play when their investigation leads them into the violent world of underground street fighting.
During the week of Christmas, The Team is Forced to work overtime when they discover their prime suspect had been dead for 17 years.
The Team is forced to uncover the truth behind the murder of a guard after a women's prison riot traps one of their own. Also McGee becomes held captive in the women's prison.
Secrets from Ducky's clandestine (secret) past come to the forefront after he's attacked (stabbed) at a crime scene. The team uncovers disturbing secrets from the good doctor's past.
A slain sergeant's private life is on full display as the team must determine if a suspected act of treason lead to his death.
A Marine was found dead in his home town. He was found dead by young people playing with firearms. The dead Marine has a past in the Latin gangs.
Two Marine how are former gang members are the number 1 suspects. One will remind Gibbs of a painful memorie. The mother of the dead soldier saved Gibbs his life eighteen years ago in the Colombian Jungle. After having hidden and treated, Gibbs was able to escape the Colombian drug cartel... Mike Franks will help the Team in this case.
A Navy Lieutenant is found dead in a large suitcase in a luxury hotel. But the lieutenant had been the witness in a NCIS investigation when Tony was the leader of the team some years ago. Gibbs gives the direction of the investigation to Tony...
While working on a case, an NCIS special agent is murdered in the same way as a businessman of Arizona, the native region of the agent. The only clue is a painting send to the Gibbs team, just before dying. The investigation will lead Tony and Gibbs in Arizona while the rest of the team will work on painting and the search for the assassins. The uranium will be at the center of the case and Gibbs will use his talents as a sniper to avoid death.
A boxer's death leads Vance to start up his own investigation, causing a sparring match with Gibbs.
When a young boy finds a murder weapon, the team must trace ownership of the gun to find who used it last and who was murdered.
Gibbs and the team must work with the shady Trent Kort to put away one of NCIS's most wanted.
When a government scientist goes missing, Abby is recruited to carry on his work, but the team worries that she may meet the same fate as her predecessor.
The body of a Marine leads Gibbs and McGee to the NCIS (Office of Special Projects) OSP division in Los Angeles, where a murder investigation quickly climbs to a matter of national security in which the two offices must work together to resolve.
Meanwhile, Tony begins to snoop into Ziva's personal life.
With the appearance of Mossad agent Michael Rivkin, Tony is forced to question Ziva’s loyalty to NCIS.
Meanwhile, in Los Angeles, Special Agent Callen goes undercover to try to catch a terrorist cell while OSP psychologist Nate Getz discovers the startling truth about Gibbs and Special Agent Lara Macy’s relationship.
After a security breach at the SecNav's residence leads to the death of an ICE agent, Gibbs and the team are forced to work with ICE and the FBI to find his killer.
Meanwhile, Tony finally comes face-to-face with Michael Rivkin
Ziva's homecoming to Israel is not a happy reunion with her father who is the head of Mossad. While Gibbs and the team are there, Gibbs is forced to make a decision which is felt throughout NCIS.
As the hunt for Ziva's replacement begins, Gibbs and his remaining team members must head back to work with the past still weighing heavily on their minds.
The team discovers the bizarre death of a Marine and his two friends may be linked to their past, but its Gibbs who ends up taking a trip down memory lane.
The team must take a second look into the death of a lieutenant after the blogger who accused them of a cover-up ends up dead.
When a Marine's body surfaces halfway around the world, the investigation forces Ziva to dig up a buried chapter of her life.
A Marine famous for pulling his original pranks is found murdered on the night of Halloween and the NCIS team uncovers that the victim's pranks may have become a ghoulish retribution.
Meanwhile, Ziva is given a new role on the team.
Prompted by a murder investigation, Gibbs and his team need to play family counselor to Gibbs' former mentor, Mike Franks, hoping to prevent an international conflict.
With the team's help, Vance faces his demons while uncovering a complex relationship with a killer that puts his whole family in danger.
When an attempted robbery leaves a Lieutenant dead and the entire city without power, the team must figure out what happened through old fashion methods.
A dead Marine's day job at a government think tank leads Gibbs and the team into the life of a 12-year-old prodigy who may be the killer's next target.
The body of the son of a retired Colonel-turned-preacher is found and the team have their suspicions that he may be the victim of a hate crime.
Meanwhile, Gibbs gets a holiday visit from his father.
When a Navy pilot is found dead under strange circumstances in a secluded area, the team finds themselves battling a no-nonsense attorney with a hidden agenda.
Anthony DiNozzo Sr., father of Tony gets involved with a case concerning an assassination plot against a prince. The elder DiNozzo's link will cause Gibbs to doubt whether Tony can remain impartial in the investigation.
In order to solve a case, Tony and Ziva are sent packing to the most romantic city in the world, Paris! The hotel screws up their room reservations and accidently has them share a room.
The team finds themselves in a race against time when a terrorist group threatens to detonate a "dirty bomb" in the D.C. area.
When a Marine is found dead, Gibbs, Fornell and the team hit the open road to bust an illegal trucking operation.
Secrets arise when Gibbs' former mother-in-law surfaces as a witness in a murder investigation.
The team investigates the shooting of a Marine and uncovers more to his life than anyone would have ever imagined.
The team discovers striking similarities between themselves and their CGIS (Coast Guard Investigative Services) counterparts when a Navy diver seeking sunken treasure is found dead.
The death of a Navy officer leads Gibbs and the team into the world of high-priced call girls, relying on D.C. Madam Holly Snow to help them catch a killer.
When an NCIS polygraph specialist's night job takes a dangerous turn, Gibbs, Fornell and the team have to uncover the truth.
DiNozzo finds himself increasingly captivated by a woman he's never met while investigating the murder of her brother.
The team tries to track down a serial killer, while Abby heads south of the border to give a speech with McGee in tow.
When a colleague's murder sends shockwaves through the team, Gibbs uncovers a surprising link to the crime.
In the conclusion of a two-part finale, Gibbs heads to Mexico for a showdown with a drug cartel intent on revenge. Gibbs has to reassess the rules by which he lives when he is forced to make a devastating choice to save the lives of his team.
With Paloma Reynosa still on the loose, Gibbs must take desperate measures to protect the ones he loves.
A young girl's kidnapping turns into much more when her grandfather complicates the investigation.
When the motives behind an attack on a female bomb tech link her to a murder, the NCIS team investigates her very guarded personal life.
When the body of an American officer is connected to a British Navy vessel, murder turns into an international incident.
When a controversial DJ and a Naval Officer are shot to death, the team uncovers a sinister plan.
Delving into the mind of a brilliant Naval Scientist, Abby becomes fixated on solving her murder, while DiNozzo's latest fling leads to an interesting Halloween.
DiNozzo's father returns, playing a vital role in a murder investigation that could have catastrophic results.
The team is assigned to protect Ziva's father, when his attendance at a NCIS conference leads to some unexpected surprises.
The team scrambles for answers after a shocking ambush reveals a new twist to their current investigatio.
The NCIS team investigates the disappearance of a Navy petty officer who is the sole witness in an upcoming murder trial.
Gibbs and the NCIS team partner with a Coast Guard Investigative Service (CGIS) Agent to solve the murder of a Marine gunned down on a dinner boat.
A petty officer's recruitment session at a college fair comes to a fatal end, prompting the NCIS team, accompanied by Dr. Mallard's predecessor, to solve his murder.
The NCIS team springs into action to find the assailant responsible for beating a Marine to death in his own backyard.
The NCIS team undergoes mandatory psych evaluations while investigating the death of a naval commander.
A botched assassination attempt in Belgravia forces NCIS to protect the Defense Minister's daughter, who is studying in the U.S. and smitten with McGee. Meanwhile, Gibbs investigates the death of the U.S. Marine who was killed in the bombing.
The dismembered fingertips and teeth of a murdered Marine are discovered in the stolen purse of a pickpocketer, launching NCIS on a mission to find a cold-blooded killer.
NCIS discovers that one of its former investigative assistants found brutally stabbed to death was selling details for how to rob a warehouse full of valuable possessions belonging to a woman convicted of fraud. Meanwhile, a new special agent joins the office.
Gibbs questions Vance's motives when he is asked to interrogate a teenage boy accused of killing his retired Marine father.
NCIS connects a message in blood left by a murdered Navy commander to a manuscript that may contain classified military information.
To Gibbs' displeasure, Special Agent E.J. Barrett returns to lead the investigation of a seaman's death that may be connected to a series of port-related murders. Meanwhile, Ziva finally introduces her boyfriend, Ray, to the team
The NCIS team tracks a Navy lieutenant's killer after a Pentagon security camera reveals a petty officer committing the crime. Meanwhile, Gibbs announces that Agent Barrett and her team will take over the Port-to-Port serial killer case.
After Tony's ex-partner, Danny Price, appears to be the Port-to-Port Killer's latest victim, he revisits his days as a detective in Baltimore, including his first encounter with Gibbs.
After new evidence reveals that the Port-to-Port killer has infiltrated the agency, the NCIS teams chase every lead in a race to track him down.
The lives of NCIS members are in jeopardy when they come face-to-face with the infamous Port-to-Port killer.
After spending months tracking down his target, Tony is left with the blood of an NCIS agent on his hands and it's up to Gibbs to help him put the pieces of the puzzle together.
The NCIS team uncovers a startling surprise after a young Marine shows up to his homecoming party with a fatal stab wound.
The line between McGee's personal and professional life is blurred when NCIS uncovers a connection between his grandmother and the murder of a Navy lieutenant.
The NCIS team searches for the person and motive behind a contract killer targeting a Navy Lieutenant Commander. Meanwhile, Abby uncovers new information about her family after undergoing tests for a kidney donation.
While investigating the murder of a coast guard officer aboard an abandoned cargo vessel, the NCIS team finds a Lebanese family seeking refuge in the US. Meanwhile, Tony and McGee attempt to find the perfect woman for Gibbs.
An NCIS case changes from accidental death to murder when evidence reveals that a Navy lieutenant died of forced over-hydration. Meanwhile, Gibbs meets Ducky’s new love interest.
The NCIS team searches for answers when the current husband of both Gibbs’s and Fornell’s ex-wife is suspiciously kidnapped.
The NCIS team uncovers a discrepancy with DNA remains when investigating the crash of a military plane that had been transporting caskets
As the NCIS team continues its search for a missing Marine, Gibbs and Ziva travel to her last known whereabouts in Afghanistan. Meanwhile, Tony reveals his deepest fears and Gibbs is forced to relive events from his past
After Anthony DiNozzo, Sr. is found in a car with a dead body in the trunk and no memory of the previous night, the NCIS team must figure out if he is capable of murder. Meanwhile, Tony is sidelined for this case and must go against orders to try and prove his father’s innocence.
When a Navy captain is killed in a hotel room, NCIS must track down and protect his very pregnant companion from unknown assailants. Meanwhile, Jimmy has problems of his own when he brings his future father-in-law to work.
The investigation into the murder of a Navy Commander leads the NCIS team to E.J. Barrett’s whereabouts.
When a Navy lieutenant commander is found dead in a building under construction, NCIS must search for a killer while dealing with interruptions from her distraught detective husband. Meanwhile, Ray’s return has Ziva thinking about her future.
During a routine stop for his morning coffee, Gibbs finds himself staring down the barrel of a gun, forcing him to question choices he has made in the past and present
When a Navy captain is found dead with an unusual costume hidden under his uniform, NCIS uncovers a secret society of real-life super heroes and must track down the villain.
When a high-level security Navy reservist is found dead, Gibbs goes face-to-face with Dr. Samantha Ryan of the PsyOps Division to uncover the truth behind the potential suicide. Meanwhile, DiNozzo argues with accounting after seeing McGee's paycheck.
Top-secret clearance from a Naval research laboratory is jeopardized when the murder of a Chief Petty Officer is connected to an international arms dealer. Meanwhile, Probationary Agent Ned Dorneget tries to butter up Gibbs in hopes of joining the team.
The Secretary of the Navy partners Gibbs with Dr. Samantha Ryan after top secret information is leaked by someone on the inside.
Director Vance’s brother-in-law is the lead suspect when Gibbs and the NCIS team investigate the murder of a petty officer.
Following the murder of a Marine, Tony and Ziva join Ziva’s longtime friend and mentor in Columbia in a search for a missing Marine Lieutenant and Navy Chaplain. Meanwhile, Jimmy Palmer decides who will be his best man.
After a warehouse fire reveals missing Navy documents, posing a potential threat to national security, the NCIS team joins the Baltimore P.D. investigation, reuniting Tony with a boy from his past.
The NCIS investigation of a fire on a Navy vessel reveals evidence that elevates security at all U.S. Navy facilities worldwide. Meanwhile, DiNozzo and Ziva travel to Italy when an explosive device is found hidden on a Navy ship.
The NCIS team analyzes what secrets could be in the hands of a terrorist targeting the Navy when a high-tech bug is found inside a probationary agent’s tooth. Meanwhile, the festivities for Jimmy Palmer’s upcoming wedding continue with the bachelor party.
Terrorism threatens to shake the foundations of the Navy and NCIS, when the team continues to be eluded by the newest member of the NCIS Most Wanted Wall. Meanwhile, Jimmy Palmer's destination wedding is impacted by the case.
Harper Dearing’s latest act of terrorism ripped through NCIS headquarters in last season’s cliffhanger finale, sparking a cross-agency manhunt for the criminal mastermind.
When the body of a missing NCIS facilities manager is found four months after disappearing on the day of the Navy Yard bombings, the NCIS team is assigned to investigate the strange case for one of their own. Meanwhile, the team is required to complete mandatory psych evaluations with a crisis counselor, and Gibbs is most concerned about Abby’s recurring nightmares since the bombing.
While on medical leave, Ducky orders the exhumation of a Navy commander’s body from a case closed 12 years ago. As a result, Gibbs tasks Ducky with a slightly different role on the investigation. Meanwhile, the NCIS team investigates the recent death of a Marine. As both cases unfold, the team begins to question whether the two are somehow connected.
When a helicopter crew is adrift at sea and later discovered on shore, the NCIS team must determine the cause of the crash and locate the missing pilot. Meanwhile, Tony and McGee channel their inner “Maverick” and “Iceman,” a la “Top Gun,” and Ziva challenges them to a dare.
A petty officer is gunned down in a billionaire’s Ferrari and the investigation leads the NCIS team to discover a link to a man Gibbs was named after.
When a Navy Lieutenant who recently returned home from the Middle East is found dead from a brutal attack, the NCIS team questions the victim’s friend, Marine Captain Joe Wescott. Gibbs realizes the Captain is suffering from post-traumatic stress disorder, but knows his experience overseas may also provide a key link to the crime
Gibbs continues to work with Captain Wescott while he retraces his steps in order to help the NCIS team track down a terrorist. With Thanksgiving on the horizon, Abby’s enthusiasm for the NCIS family dinner is building, and Tony’s curiosity is peaking when he learns Ziva is making special plans for the opera.
As the NCIS team investigates a teenage girl’s abduction, Ziva and Abby work closely with her young friend who witnessed the kidnapping. As the investigation unfolds, Gibbs seeks help from a past contact, Miranda Pennebaker, a well-connected woman with questionable morals. Meanwhile, Tony gets jealous when he learns Ziva is making plans with a mysterious man.
Gibbs teams up with FBI Agent Fornell on a joint NCIS/FBI investigation after Fornell becomes the target of a shooting, but they face an unexpected twist in the case when their mutual ex-wife, Diane Sterling, gets involved. Meanwhile, rumors run wild among the group after Diane stays overnight at McGee’s.
It’s Christmas time and Tony DiNozzo can’t decide if he’ll be naughty or nice when his dad, Anthony DiNozzo, Sr., comes to town for a visit. Meanwhile, the NCIS team is “following the money” in order to solve a murder investigation, and Abby is bursting with excitement over all the holiday festivities.
While the NCIS team investigates the link to a dead journalist and a Navy petty officer, Ziva is taken aback by the sudden emotional visit by her father, who she hasn't seen in more than two years. While Ziva questions the purpose of her father's visit as the Director of Mossad, her father insists he is in the U.S. strictly to see his daughter for Shabbat dinner.
In the aftermath of an event that strikes close to home, the NCIS team unites to seek answers and demand justice in order to protect their most vulnerable colleagues.
The NCIS team investigates a Marine’s car accident and ignites some upsetting past memories for Abby as a young girl on the trail of her first “case.
The NCIS team takes on a renowned hacker who could hold the key to tracking down the most-wanted cyber-terrorist in the world.
On leave from NCIS while still grieving the loss of his wife and his kids’ mother, Director Vance discovers unexpected personal information that causes him to question everything.
The NCIS team races to track down Ducky and Jimmy after the two disappear while transporting a body from a crime scene.
A media frenzy surrounding an unidentified criminal prompts Gibbs' barber to question his son's involvement and ask for Gibbs' help in ruling out his son as a prime suspect.
After a Marine is fatally wounded in Afghanistan, his widow asks NCIS to investigate the circumstances surrounding his death.
Director Vance has been interviewing prospective nannies, but he seems reluctant to make a decision.
A massive storm brings the NCIS team aboard the USS Borealis, where everyone becomes a suspect once the crime scene proves that Mother Nature wasn’t the only culprit. Tension builds when McGee discovers that his estranged father, Navy Admiral John McGee, was on board during the incident.
When a Navy reservist returns home to find her husband missing and her living room covered in blood, she turns to the NCIS team to bring him home. Meanwhile, Tony suspects that Ziva is planning a risky move to avenge her father’s death.
While the NCIS team investigates the murder of a Mossad officer in Virginia, Tony and Ziva depart for Berlin as they track her father’s killer.
In retaliation for the murders of Eli David and Jackie Vance, the NCIS team feverishly searches for Bodnar despite orders from Homeland Security to relinquish the case.
A Department of Defense investigator scrutinizes the NCIS team’s response to the Bodnar case involving the murder of Ziva’s father and Vance’s wife. Meanwhile, the team examines whether a Petty Officer is suffering from paranoia or if his claims of being followed are tied to a matter of national security.
The international manhunt for Eli David and Jackie Vance's killer turns into a federal witch hunt against Gibbs and the team, which questions their unconventional methods and threatens their future at the agency.
An explosion at a D.C. event that results in a casualty connected to the agency changes Parsons’ perspective on Gibbs and the NCIS team. Meanwhile, without badges, DiNozzo and McGee investigate the case as civilians, despite the case’s dangerous ties to each of them.
Determined to locate Ziva, Tony chases leads in Israel in search of her current whereabouts. Meanwhile, Gibbs and the team continue the hunt for Parsa and his growing terrorist ring.
The NCIS team must rely on Twitter for a case involving a missing Navy Lieutenant. Meanwhile, McGee misplaces his badge but withholds the information from Gibbs and the authorities.
Gibbs and McGee travel to Afghanistan when a murder case leads them to an Afghan women’s shelter Mike Frank’s secretly supported for years.
DiNozzo spots a suspect from a 15-year-old cold case he handled when he was with the Baltimore PD at the scene of the murder of a Petty Officer.
NCIS partners with the Coast Guard Investigative Service to probe a suspicious explosion on board an oil rig. Meanwhile, a prankster targets the NCIS team.
After Gibbs leaves mid-case to help his father reconnect with a former war pilot, Tony and McGee argue over who should run lead on the team’s investigation into the murder of a Marine Sergeant.
The NCIS team is forced to re-examine a hit-and-run murder case when a former FBI agent turned lawyer confides in Gibbs that her client’s confidential alibi is solid. Meanwhile, McGee grows suspicious of Tony’s strange behavior.
NSA Analyst Ellie Bishop who had previously reported a security breach in complete detail 2 years ago, joins the team when the secretary of the Navy has been bugged during a confidential briefing.
The NCIS team discover a link between a victim of murder, Fornell's ex-wife and her current boyfriend disturbing the teams current investigations. Ellie struggles adjusting to joining the team.
Director Vance has an unexpected house call from his estranged father-in-law. A mysterious illness wipes out children from military families, leaving Gibbs to find out the cause and Abby and Jimmy to determine the strain of illness, with help from the Naval Medical Research Center.
The NCIS team partner up with the Department of Defense when a drone linked to terrorist Parsa is stolen. This leads to an awkward encounter with Gibb's former girlfriend Hollis Mann. Time is of the essence to track the device down before it's used. McGee's girlfriend's black-tie gala event is coming up, but he's reluctant to book the time off.
Gibbs and the team track down one of Parsas' cohorts using evidence from the drone attack in an attempt to find the whereabouts of the terrorist. McGee struggles to cope emotionally after the incident.
Para's possible whereabouts are revealed when a port authority officer is murdered. Bishop is forced into revealing her past association with the terrorist.
When the team discovers fatal bulletproof vests, they race to track down the source of the vests. Things get much worse when some military mothers appear to have send their sons and daughters exra body armour.
After DiNozzo faces a man who is impersonating a Navy officer, he shoots and kills the man. The team investigates why the man pretended to be a Navy officer, and they have to rely on the information from the sole eyewitness of the shooting, DiNozzo's father. Meanwhile, Tony's father wants to reveal something to his son.
After a bomb detonates in the dressing room at a military charity concert, the NCIS team must determine if the target was a washed-up ‘80s rocker or if the bomb was part of a larger scheme. Meanwhile, Jimmy prepares for fatherhood.
When the body of Congressman Dan McLane, a former NCIS agent, washes ashore in New Orleans, Gibbs reunites with his former colleague, NCIS Special Agent Dwayne Cassius Pride, in a joint case between the two field offices and the FBI. The teams must work together to determine if the murder was politically based or linked to McLane’s most well-known case, the arrest of the Privileged Killer, a serial murderer who targeted military and public servants.
Gibbs and Special Agent Pride chase leads in New Orleans after evidence points to a copycat of the infamous Privileged Killer. Meanwhile, Bishop sends DiNozzo a special souvenir from the Crescent City, as DiNozzo, McGee and the FBI continue to track political connections to the case from D.C.
After returning to her job at the Department of Defense, McGee’s girlfriend Delilah finds a break in a controversial case, prompting her to turn to the NCIS team for help. Meanwhile, McGee talks to DiNozzo about whether he should ask Delilah to move in.
After a Navy officer is found dead on a rural road, the NCIS team must ascertain if the murder was the result of a bar fight or because he knew too much about an attack on a fellow female officer. Meanwhile, DiNozzo and McGee start a juice cleanse to purge their bodies of impurities.
When a Marine photographer disappears prior to providing his testimony in an Army court-martial hearing, the NCIS team investigates both the murder he witnessed as well as his current piece on military veterans who are homeless in the D.C. area. Meanwhile, Abby tries to help a young homeless woman reconnect with her family.
Director Vance gives DiNozzo a special assignment to bring home an Admiral’s daughter from Paris, but he must turn to his NCIS team for help after he enters a controversial crime scene.
The NCIS team investigates whether a fire on a U.S. Navy ship that served as a secret detention site for indicted terrorists was accidental or an intentional diversion for an escape. Meanwhile, Gibbs travels to his childhood home following news of his father’s passing.
Gibbs and McGee travel to Russia to safely escort home an NCIS computer engineer connected to classified intel, but their mission is compromised and they are forced to go off the grid while hunted by a Russian mercenary group. Meanwhile, the team in D.C. frantically uses every asset and inter-agency contact they have in an attempt to locate their missing team members.
When a Navy Lieutenant is killed on his way to a private meeting with the President, the NCIS team must determine if the murder was part of a recent stream of muggings in the area or a targeted hit to keep intel secret.
When an NCIS case reveals a connection to Ducky’s estranged childhood best friend, he and Special Agent Bishop travel to London for interviews with family and co-workers of his friend. While there, Ducky finds himself reminiscing about the choices he made in his past and the subsequent impact they had on his adult life.
The Secretary of the Navy assigns the NCIS team to a joint terrorism task force after a Naval research scientist is murdered and the lead suspect is wanted by the Russian government. In order to get a jump on the case, Gibbs has DiNozzo run interference with the leader of the task force, FBI Agent Leia Pendergast.
During a joint Coast Guard and NCIS training exercise at sea, Gibbs and CGIS Agent Borin spot a deceased man overboard, who is discovered to be a missing crew member from a ship 60 nautical miles away. Upon boarding the ship for questioning, Gibbs finds himself on a vessel that has been commandeered by pirates.
A Navy commander's wife is discovered dead and the team have to determine whether her death is linked to her profession as a therapist or an act of terrorism after they see her husband's name on a jihadist target list.
The team uncover a fraudulent charity who are targeting people looking for missing military personnel.
While the NCIS team investigates the cause of a hit and run accident that resulted in the death of a Petty Officer, Gibbs searches for a way to clear a Navy Hospital Corpsman, who has served two medical tours in Afghanistan, after she’s indicted for illegally providing medical aid to the victims of the crash, even though the surviving victims swear by her life-saving techniques.
Whilst they wait at the Dulles airport due to bad weather, DiNozzo, Bishop and her husband Jake work an NCIS case featuring an terrorist threat at Northeast airports during the peak Thanksgiving travel period.
The team work with three imprisoned cyberterrorists after the city's Internet is shutdown.
The NCIS team investigate a series of crime scenes that appear to be copycats of previous cases. Meanwhile, two of Gibbs' ex-wives show up at a crime scene to discuss something important with him.
The NCIS team searches for a home-grown terrorist after a rescue mission in Syria reveals an American was involved in the capture of a social worker. Meanwhile, McGee and Bishop question DiNozzo’s unusual behavior.
Gibbs and the team investigate when a Navy lieutenant who is set to be the first openly gay servicemember to receive the Medal of Honor is murdered. Also, as his wife’s due date approaches, Palmer prepares for fatherhood with a NCIS baby shower.
DiNozzo returns to the military academy he attended as a teenager after a murdered Marine and alumni of the school is found clutching the photo of a current student. Also, Bishop and her husband invite Gibbs and the team out for a special dinner.
The team suspects Gibbs' archenemy following an explosion.
A covert identity created for one of Gibbs’ undercover cases 20 years ago resurfaces after a murder victim is found living under the alias.
Evidence in an NCIS murder case reveals a rare painting on loan had been swapped for a fake, prompting DiNozzo, Sr. to share his knowledge and contacts of the black market art world with the team.