
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.

After a body is found at an unmanned aerial vehicle testing site, the NCIS team must determine if the death was murder or an accident; Palmer carefully interviews medical examiner assistant candidates.

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

A boxer's death leads to Vance starting his own investigation; Gibbs looks into Vance's past.

A military family comes under suspicion when a boy finds a murder weapon and the team must track ownership of the gun.