
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 must face the reality of his actions after he assists Ziva with "the one thing" she said she would need to take care of before returning to her family.

The NCIS team investigates an F-18 crash and the subsequent disappearance of the pilot; McGee reluctantly discusses a very personal decision with his teammates.

Ziva surprises Gibbs with a cryptic warning, prompting him to question why she remained underground for years while being presumed dead by family and friends.

With their lives in danger, Gibbs and Ziva's rogue investigation takes an unexpected turn when a possible terrorist plot is revealed.