NCIS (Naval Criminal Investigative Service) is more than just an action drama. With liberal doses of humor, it focuses on the sometimes complex and always amusing dynamics of a team forced to work together in high-stress situations. Leading this troupe of colorful personalities is NCIS Special Agent Leroy Jethro Gibbs (Mark Harmon), a former Marine gunnery sergeant, whose skills as an investigator are unmatched. Gibbs is a man of few words who only needs a look to explain it all. Working under Gibbs is Special Agent Anthony DiNozzo (Michael Weatherly), an ex-homicide detective who may come off as the world's oldest frat boy, but whose instincts in the field are unparalleled. Joining them are forensic specialist Abby Sciuto (Pauley Perrette), a talented scientist whose dark wit matches her Goth style and eclectic tastes, NCIS Special Agent Timothy McGee (Sean Murray), an MIT graduate whose brilliance with computers far overshadows his insecurities in the field, and the newest member of the team, Ziva David (Cote de Pablo), a former Moussad agent who shares a bond with Gibbs over the death of his arch nemesis, Ari, the terrorist who killed former NCIS Special Agent Kate Todd. Assisting the team is medical examiner Dr. Donald "Ducky" Mallard (David McCallum), who knows it all because he's seen it all, and he's not afraid to let you know. NCIS also has a new director, Jennifer Shepard (Lauren Holly), who has a romantic history with Gibbs. From murder and espionage to terrorism and stolen submarines, these special agents travel the globe to investigate all crimes with Navy or Marine Corps ties.