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 Lauren Holly NCIS Director Jenny Shepard Actor David McCallum Dr. Donald "Ducky" Mallard Actor Seamus Dever Graham Thomas Guest Star Misha Collins Justin Farris Guest Star Daniel Hagen Calvin Hopper Guest Star Claire Coffee Nikki Crawshaw Guest Star Mike Beaver Larry West Guest Star Mieko Hillman Jennifer Murphy Guest Star Donald P. Bellisario Executive Producer Terrence O'Hara Director David J. North Writer John C. Kelley Writer