Gibbs and the team investigate the shooting of a Marine and uncovers more to his life than anyone would have ever imagined.

The team scrambles for answers after a shocking ambush reveals a new twist to their current investigation.

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 murder case of a retired Navy Lieutenant Commander forces Ducky to reveal his participation in a secret society that solves cold cases.

The murder of a Petty Officer in a small town outside D.C. prompts NCIS to once again work with "The Sherlocks," a privately funded investigative team that includes their newest member, Anthony DiNozzo, Sr.

After the body of a missing Navy commander is found, Vance orders Gibbs and the team to work with former FBI Agent Tobias "T.C." Fornell, the private investigator who was hired to locate him. Also, Bishop and Torres interview convicted investment advisor Albert Hathaway when the victim is linked to his highly publicized trial.

After a malnourished and confused 9-year-old is found hiding in a storage unit, NCIS reopens an old missing persons case when the girl is believed to be the daughter of a Navy recruit who disappeared 10 years ago. Also, Bishop discovers notes that Special Agent Ziva David kept on the case long after NCIS officially stopped investigating.

After Torres and Bishop are victims of a hit-and-run, Torres fights for his life in the Intensive Care Unit.