While on Air Force One, a Navy commanding officer dies. Agents from the Navy NCIS decide to take the investigation into their own hands and also force a Secret Service Agent to help. Now the NCIS team has to figure out if the Navy officer's death was of natural causes or not.
During a training exercise, a Marine's parachute fails to open and he crashes into a parked car. The NCIS team head to the scene and have 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 investigate 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 an MMORPG. Now, the team must figure out how involved he was in the game and how far he would go to get revenge on his arch enemy, another sailor.
A Navy Lieutenant who was reported missing nearly ten years ago has been found by a deer hunter. When the NCIS team arrive 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.
A decomposed body is discovered in a tub of acid at a Naval base and Ducky and Abby learn that the victim was a submariner. However, there have been no reports of a sub crewmember missing.
The NCIS team head to Cuba to investigate a Navy translator's connection to smuggling at a detention center after he suddenly dies at the wheel of his car when returning to the U.S. from Guantanamo Bay.
After a Marine widow receives a call from her dead husband, the NCIS team take on the case and have to exhume the body to deduce whether the call was a prank or not.
After being buried alive, a woman comes out of the grave with amnesia and the only thing she remembers is that there is a bomb aboard a Navy ship. While trying to help Jane Doe recover her identity, the team find out that not everything is what it first seemed.
When a Navy commander, who was a technical advisor to a civilian contractor for a Navy weapon, is found dead on the beach, the NCIS team investigate the murder using satellite technology.
The NCIS team are called in when a severed leg bearing a Marine tattoo is found in a trash bin, leading them to a small town where a murder scheme is afoot.
The team investigate when a Marine recruitment officer is found shot to death by a sniper with a grudge, who leaves a white feather behind.
A Navy dentist stops near a parked car to help a stranded motorist who pulls out a gun. The team investigate a murder with the help from a local sheriff, Charley, when they find out about the similar murder of the Navy civilian employee.
Gibbs risks his career when his former commanding officer is accused of stealing funds.
A terrorist holds Ducky, Gerald, and Kate hostage while NCIS investigate how exactly the terror organization member got a job at a Navy base.
When the body of a sailor is found after a party in an illegal night club, the team investigate a number of possible leads - including blackmail and accidental death.
The team are looking for an ex-SEAL who escaped from prison in search of revenge. He is determined to find the real murderer of his wife.
An NCIS agent has been murdered while investigating a case and the team's job is to find out what happened.
A Marine goes missing after a date with a reporter. During the investigation, the team discover that three former members of his unit are dead and suspect the unit commander to be a serial killer.
When a body of a murdered Marine is found in the forest, the investigation leads to the local militia and a weapon deal gone wrong.
Gibbs' team investigate the death of a SEAL during a training exercise, and come to suspect that it wasn't an accident, but a murder.
The terrorist from Bête Noire returns with a plan to attack the President. Gibbs and his team follow the clues to reveal his identity and find Kate who is kidnapped.