NCIS is a spin-off of “JAG,” and is based on 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. The rest of the team is made up of Special Agent Mgee (referred to often by Dinozzo as Mcgeek), 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.
Newcomer to the team is Mosad Agent Ziva David who brings a new sense of humour to a a show already packed with light hearted banter, action and suspense.