Season 7: Special Agent Leroy Jethro Gibbs brings us the inner workings of the government agency that investigates all crimes involving Navy and Marine Corps personnel. From murder and espionage to terrorism and stolen submarines, these special agents are back to traverse the globe, investigating these crimes.

Cast: Mark Harmon, Michael Weatherly, Pauley Perrette, David McCallum, Sean Murray, Cote de Pablo and Rocky Carroll.

From Donald P. Bellisario comes NCIS, a show bringing us the inner workings of the government agency that investigates all crimes involving Navy and Marine Corps personnel, regardless of rank or position. From murder and espionage to terrorism and stolen submarines, these special agents traverse the globe to investigate all crimes with Navy or Marine Corps ties.

Joining them is Abby Sciuto (Pauley Perrette), a gifted forensics specialist whose dark wit matches her goth-style hair and clothes, and Dr. Donald "Ducky" Mallard (David McCallum), a medical examiner.

Through season one a new character has been introduced -- special agent Tim McGee (Sean Murray, The Random Years) whose computer skills will be a very big part of the NCIS team.

Special Agent Caitlin "Kate" Todd (Sasha Alexander, Dawson's Creek), a former United States Secret Service agent, has brought her intelligence and gutsy personality to the team through first 2 seasons, until during her duty in season two finale, when she was murdered by a terrorist.

In season three, the NCIS team welcomed Mossad Agent Ziva David (Cote de Pablo), who took Kate's place in the team, and the NCIS team got a new director, Jenny Shepard (Lauren Holly). After Holly's departure at the end of Season 5, the position of the NCIS director was taken over by Leon Vance (Rocky Carroll).