Agents in Washington, DC search for their missing colleagues, a US Navy lieutenant's body is found buried in a cemetery, a sailor is kidnapped, and Special Agent Jacqueline Sloane assists.
A petty officer is found murdered on a golf course, and when it emerges his amateur radio habit might be the key to catching the killer, McGee gets a chance to revisit his favourite childhood hobby bt spending hours on the victim's ham radio. Palmer asks his co-workers to donate to a charity.
Thanksgiving arrives, but the NCIS agents' plans to celebrate are put on hold when they are tasked with tracking an elusive international arms dealer at large in DC who recently murdered an MI6 officer. Meanwhile, Abby races Delilah to the hospital when her labour starts three weeks early.
Gibbs and Ducky see an antique war stick on television that could be the missing murder weapon in a 16-year-old cold case. Drama following the work of the Naval Criminal Investigative Service that investigates cases involving the US Navy and Marine Corps. Starring Mark Harmon, David McCallum and Pauley Perrette.
Sara Carter begs Gibbs to investigate her mother's murder, as she believes the local authorities have convicted the wrong man. Abby is awarded a dinner reservation for two to a new five-star restaurant in an igloo, and has to decide which co-worker deserves to go with her. Mark Harmon, Pauley Perrette and Skye P Marshall star.
When evidence reveals an NCIS team member is a hitman's latest target, the team members are tasked with searching through old case files to determine who is seeking vengeance. Reeves dies from injuries sustained in the gunfight with the mugger, having instinctively protected Abby, who ends up in the hospital. It transpired the mugger was hired by Robert King, who held a grudge against Abby since his arrest. Looking over Reeves' body in the autopsy room, Abby vows to carry on his wish to start a charity in his native London, deciding to leave NCIS to do so. Pauley Perrette stars.
Sloane is adamant that a man who held her hostage and tortured her years ago in Afghanistan and was believed to have been killed following her rescue, is alive and in DC, leading Vance and Gibbs to fear she is willing to risk everything to destroy him. Mark Harmon, Maria Bello and Rocky Carroll star.