While on Air Force One, a Navy Commander dies. Agents from NCIS decide to take the investigation into their own hands and also force Secret Service Agent Kate Todd to help.

During a training exercise, a marine's parachute fails to open and he crashes into a parked car. The NCIS team heads to the scene and has to determine if the marine's death was accidental or a murder.

When a Navy commander's body washes up on shore along with the bodies of two drug runners, Gibbs refuses to believe that the sailor who was killed was dirty.

The NCIS team investigates when a seaman's body is found at the bottom of the sea in his dress whites, with a ceremonial sword. They discover that he was addicted to a Wizards and Warriors style role-playing game.

A Navy lieutenant who was reported missing nearly ten years ago has been found by a deer hunter. When the NCIS team arrives at the scene to investigate, they see that his remains have been mummified.

An NCIS agent who used to work under Gibbs asks for the team's help investigating a case where sailors on an aircraft carrier are dying of a drug overdose, but have no history of any kind of drug abuse.