
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.

Gibbs finds himself on an emotional journey into his past when he agrees to help the childhood friend of his now-dead daughter.

While investigating the assassination of a Navy admiral, the team meets a woman searching for her husband, a political refugee from Africa.

The search for a trained survivalist wanted in connection with a cold-case murder leads the team into the wilderness.

The team believes a Marine is being groomed to become a super soldier.