
Naval Criminal Investigative Service Special Agent Leroy Jethro Gibbs leads a group of colorful personalities in investigating crimes -- ranging from murder and espionage to terrorism -- that have evidence connected to Navy and Marine Corps personnel. The team includes MIT graduate Timothy McGee, Ellie Bishop, who specializes in international threat assessment, charismatic and unpredictable Nick Torres, and forensic psychologist Jack Sloane. Dr. Donald "Ducky" Mallard brings his vast experience in forensics into play to help solve cases.

Agent Torres finds himself in prison as the team tries to stop an impending terror attack on U.S. soil.

McGee and Torres try to recover a stolen truck filled with toys for the Navy's annual Christmas drive; the truth about Parker's mother is finally revealed; Knight is tasked with tracking down a former member of the team.

Knight is given orders to hunt down and arrest Eleanor Bishop after the former member of the NCIS team is designated a wanted cyberterrorist.

When a desperate man barricades himself inside an ammo warehouse, Knight is the only negotiator he'll talk to, claiming she once saved him before; as explosives tick and trust frays, Knight clashes with the CID officer running the standoff.