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.
Songs: Enya -- If I Could Be Where You Are
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.
Co-Guest Stars: Wes McGee
as Navy Petty Officer First Class Andrew Wells | Susan Spano
as Marie Markin
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.
Co-Guest Stars: Justin Cuomo
as Navy Petty Officer First Class Daniel Coyne | Vanessa Garcia
as Navy Petty Officer First Class Patrice Gates
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.
Co-Guest Stars: Anthony Palermo
as Nicholas “Nick” Bodeen A.K.A. Navy Commander
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.
Guest Stars: Scott Bakula
as NCIS Special Agent Dwayne Cassius Pride | Lucas Black
as NCIS Special Agent Christopher Lasalle | Zoe McLellan
as NCIS Special Agent Meredith “Merri” Brody | CCH Pounder
as Jefferson Parish Coroner Doctor Loretta Wade