5USA +1

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, and Gibbs turns to Lt 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.

When a high-value bioweapons expert is murdered in a secure facility, NCIS and the NCIS Elite team join forces to track down the killer and discover an even deadlier threat.