Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor, Executive Producer Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Wilmer Valderrama NCIS Special Agent Nicholas "Nick" Torres Actor Maria Bello NCIS Special Agent Jacqueline "Jack" Sloane Actor Emily Wickersham NCIS Special Agent Eleanor "Ellie" Bishop Actor Brian Dietzen Dr. Jimmy Palmer Actor Duane Henry MI6 Officer Clayton Reeves Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Margo Harshman Delilah Fielding Guest Star Dan Lauria Morgan Cade Guest Star Henri Lubatti Andre Yorka Guest Star Brian Kimmet George Barbado Guest Star Christine Horn Dr. Felicia Serena Guest Star Al Coronel Metro P.D. Lt. Wilton Buck Guest Star Sarah Butler Nicole Guest Star Andy Cohen Dr. Warren Cole Guest Star Rob Locke Viktor Lopuchin Guest Star Max Bird-Ridnell M15 Officer Nigel Ford Guest Star Flor de Maria Chahua Nurse Guest Star Donald Li Clerk Guest Star Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Frank Cardea Executive Producer George Schenck Executive Producer Steven D. Binder Executive Producer Scott Williams Executive Producer, Writer Donald P. Bellisario Executive Producer Terrence O'Hara Director