While on Air Force One, a Navy Commander dies. Agents from the Navy NCIS decide to take the investigation into their own hands and force Secret Service Agent Kate Todd to help. The NCIS team then has to figure out if the Navy Officer's death was of natural causes or not.

Gibbs and his agents investigate a Marine who died when his parachute failed to open during a training exercise. Gibbs turns to Lieutenant Roberts to get the necessary search warrants to prove his theory.

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 team are dispatched to a destroyer to probe the bizarre death of a sailor, discovering he was deeply immersed in an addictive fantasy role-playing game and may have been bent on exacting revenge on his arch rival.

The mummified body of a Navy lieutenant who went missing nearly 10 years ago is found by a deer hunter. The NCIS team must find out what happened to him and where the $1 million that he had on his ship went.

The team board an aircraft carrier to find out how a sailor with no history of drug abuse overdosed on methamphetamines. When a second sailor overdoses, Gibbs becomes convinced someone is doping sailors without their knowledge.