Flashbacks reveal the murder case that first introduced young Gibbs to NCIS and his introduction to young, new-to-America Ducky.

Evidence from the stabbing of a Marine Sergeant leads Torres to meet his father who left when he was a child

After the body of a thief is found in a Marine’s house, NCIS discovers the calling card of a terror group Delilah and the Department of Defense have been tracking.

A petty officer that just returned to his job is found dead in the backstage of the bikini contest. The team finds out that she possibly had a stalker behind…

Deeks is kidnapped by an associate of Kirkin’s in need of his help and NCIS investigates the shooting of a militarized dolphin equipped with a Russian microchip. Also, Beale makes…

Sam resumes a former alias and boards a one-way flight to Yemen in hopes of tracking down a terrorist group’s leader and rescuing the hostage son of a Saudi Prince.

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.

Torres relies on his team’s investigative skills after he wakes up on a dilapidated fishing boat and is covered in blood and unable to remember the last 12 hours.