NCIS (Naval Criminal Investigative Service) is more than just an action drama. With liberal doses of humor, it's a show that focuses on the sometimes complex and always amusing dynamics of a group of talented special agents who travel the globe to investigate crimes with Navy or Marine Corps ties. 

Special Agent Leroy Jethro Gibbs Gibbs (Mark Harmon) is the no-nonsense leader of the NCIS troupe of colorful personalities. The team includes ex-homicide detective Anthony DiNozzo (Michael Weatherly) the forensic specialist Abby Sciuto (Pauley Perrette), Dr. Donald "Ducky" Mallard (David McCallum) as the medical examiner, Timothy McGee (Sean Murray) as a computer specialist. Rounding out the team is NCIS director Leon Vance (Rocky Carroll), an intelligent, highly trained agent.