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.
Following the murder of a Marine, Tony and Ziva join Ziva's longtime friend and mentor (guest star Karina Lombard) in Colombia in a search for a missing Marine Lieutenant and Navy Chaplain. Meanwhile, Jimmy Palmer decides who will be his best man. Jamie Lee Curtis also guest stars.
Director Vance's brother-in-law is the lead suspect when Gibbs and the NCIS team investigate the murder of a petty officer.
The Secretary of the Navy partners Gibbs with Dr. Samantha Ryan after top secret information is leaked by someone on the inside. (guest stars include Jamie Lee Curtis and Sean Astin)
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.
When a high-level security Navy reservist is found dead, Gibbs goes face-to-face with Dr. Samantha Ryan (Jamie Lee Curtis) of the PsyOps Division to uncover the truth behind the potential suicide. Meanwhile, DiNozzo argues with accounting after seeing McGee's paycheck.
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. Perrey Reeves guest stars as Wendy Miller, DiNozzo's journalist ex-fiance'.
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 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.
The investigation into the murder of a Navy Commander leads the NCIS team to E. J. Barrett's whereabouts.
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.
After Anthony DiNozzo, Sr. (guest star Robert Wagner) 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.
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.
The NCIS team uncovers a discrepancy with DNA remains when investigating the crash of a military plane that had been transporting caskets.
The NCIS team searches for answers when the current husband of both Gibbs's and Fornell's ex-wife is suspiciously kidnapped.
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 (guest star Cheryl Ladd).
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