NCIS, or Naval Criminal investigative Service' is a television drama based on the inner workings of the government agency, Naval Criminal Investigative Service Major Case Response Team (MCRT), that investigates crimes involving the Navy and Marine Corps.This drama is packed with mystery,suspense,action and some light humor. The soundtrack to the show is always upbeat and catchy. Gibbs is a former Marines gunnery sergeant and a man of very few words. DiNozzo has a bit of an offbeat sense of humor and always quotes movie lines. Abby is the forensic specialist who is all about her music and caffpow. McGee is a smart underappreciated member of the NCIS team. Ziva a former Mossad agent now becoming a US citizen and has joined the NCIS team. Ducky is the polite Englishman who finds all the evidence of the death that has occured. Jimmy is Ducky's young assistant.Still learning all there is to know about the job.

In the fall of 2009, a spin-off, NCIS: Los Angeles premiered, starring LL Cool J and Chris O'Donnell.

• Mark Harmon as Leroy Gibbs
• Michael Weatherly as Anthony DiNozzo
• Sean Murray as Timothy McGee
• Cote De Pablo as Ziva David
• Pauley Perrette as Abby Sciuto
• David McCallum as Dr Donald" Ducky" Mallard
• Rocky Carroll as Leon Vance
• Brian Dietzen as Jimmy Palmer
• Liza Lapira as Michelle Lee
• Jonathan Magnum as Daniel Keating
• Joe Spano as Tobias C. Fornell