As the team travels to Romania to search for Hetty, Callen discovers new information about his past.
The NCIS team joins forces with the NSA to find the creator and controller of a software program linked to a cyber attack against the Department of Defense. Meanwhile, Callen continues searching for more information about his past.
Special Agent Sam Hanna is sent undercover as a bomb specialist as the team races to locate stolen explosives somewhere in the city. Meanwhile, to much protest, Hunter changes the dynamics of the team and has Callen partnered with Kensi and Sam with Deeks.
The murder of a news reporter leads the agents to a Libyan resistance movement; and Hetty reveals to Callen some details about his past.
The LAPD calls upon the NCIS team when a raid links a Mexican drug cartel to a wanted terrorist. Meanwhile, Sam's most prized possession is stolen.
A former Navy intelligence officer is murdered, and the agents discover his double life and a possible threat to national security.
The NCIS team must determine whether a dishonorably discharged Marine is the target of an international set-up or if he committed murder.
When a Navy ID is found on a dead body tied to a hazardous material smuggling case, NCIS is granted permission to investigate in Mexico and asked to help locate the missing materials.
After Sam’s undercover mission in Sudan turns deadly, Callen and the NCIS team must track down their missing agent before it is too late.
A botched assignment forces Hetty to fire Deeks and send him back to the LAPD. Meanwhile, an awkward goodbye between Kensi and Deeks leaves her with unexpected emotions for her old partner.
The NCIS team must locate a classified device with the power to destroy Los Angeles that was stolen from a college research facility. Meanwhile, Sam tries to track down a highly sought-after Christmas present for his daughter, and Eric meets Nell's parents.
When a researcher with the Department of Defense is found dead, Nell must put her high IQ to the test when she goes undercover as his replacement. Meanwhile, Hetty's ability to lead the team is questioned by the new NCIS Assistant Director, Owen Granger.
When a vehicle transporting Jada Khaled is ambushed, NCIS must track down the culprit to save her and their case. Meanwhile, Sam is forced to confront Jada for the first time since returning from Sudan.
After a diplomatic service van transporting an unknown package from the State Department is hijacked, the NCIS team must determine who committed the crime and what has gone missing. Meanwhile, Callen and Sam celebrate five years as partners, but face one of their biggest challenges when they go undercover for a case.
The NCIS team hunts an international killer who is able to transform himself like a chameleon to avoid capture, from country to country.
The NCIS: LA team searches for new evidence to prove Kensi Blye's innocence after she is taken into custody as the lead suspect in a murder investigation involving her deceased father's sniper unit.
Conclusion. The team try to clear Kensi Blye of murder charges, but their task is made more difficult when a private meeting between Blye and a CIA agent turns deadly.
The NCIS: LA team investigates a shooting outside the Vietnamese Consulate just prior to an international conference at the venue that the Secretary of the Navy is scheduled to attend.
When the body of a Navy Intel Officer is found, evidence points to a team of Navy SEALs who are about to depart on a hostage rescue mission, leaving former Navy SEAL Sam Hanna to interrogate the group and possibly compromise the mission.
Songs: Black Veil Brides -- God Bless You
When a former Marine is suspected of creating a chemical bomb, the NCIS: LA team joins the FBI's domestic terrorist task force including Operational Psychologist Nate Getz.
Special Guest Stars: Peter Cambor
as Operational Psychologist Nate Getz |
Callen and Hanna continue their pursuit of a suspect threatening to spread a deadly virus with help from Danny Williams and Chin Ho Kelly.
Special Guest Stars: Daniel Dae Kim
as Hawaii Five-0 Detective Lieutenant Chin Ho Kelly | Scott Caan
as Hawaii Five-0 Detective Sergeant Danny Williams |
NCIS believes they have found a Russian sleeper cell in the middle of the suburbs, so they get Kensi and Deeks to go undercover as a married couple.
Songs: Jakob Dylan -- In the Arms of a Ghost
Callen and the NCIS: LA team confront their vengeful adversary, the Chameleon, when an undercover case ignites a deadly mind game orchestrated by the criminal mastermind.
The third season concludes with the team being drawn into a deadly mind game with a master criminal motivated by revenge.