Click on thumbnails to see bigger pictures

From Donald P. Bellisario, an acclaimed producer, comes "NCIS," a hit spin-off of "JAG," that brings us the inner workings of the government agency that investigates all crimes involving Navy and Marine Corps personnel, regardless of rank or position.

Leading this team that operates outside of the military chain of command is NCIS Special Agent Leroy Jethro Gibbs (Mark Harmon), a skilled investigator and interrogator who is smart, tough and willing to bend the rules to get the job done.

Working under Gibbs is Agent Anthony Dinozzo (Michael Weatherly), a former homicide detective who joined NCIS just a few years ago, but who has instincts that can come only from working on the streets.

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

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.

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 takes Kate's place in the team, and the NCIS team gets a new director, Jenny Shepard (Lauren Holly, "Picket Fences"). Both Cote and Lauren were recurring stars before they became regulars.

The title "NCIS," stands for Naval Criminal Investigative Service. The show was previously titled "Navy NCIS" during the first year.
http://www.tv.com/ncis/show/16772/summary.html