Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Cote de Pablo NCIS Special Agent Ziva David Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Brian Dietzen Jimmy Palmer Guest Star Christian Clemenson Perry Sterling Guest Star David Dayan Fisher Trent Kort Guest Star James Ellis Lane U.S. Marshal Guest Star Lissa Cohen Nurse Guest Star Thom Williams Eric Killian Guest Star Donald P. Bellisario Executive Producer Terence O'Hara Director David J. North Writer Reed Steiner Writer Christopher J. Waild Writer