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 Diona Reasonover Forensic Scientist Kasie Hines Guest Star Mike Wolfe Himself Guest Star Kamal Angelo Bolden Clarence Wyatt Guest Star Alyson Reed Monica Keogh Guest Star Leonard Kelly-Young George Keogh Guest Star Clark Freeman Bill Lester Guest Star Shireen Crutchfield Jane Woods Guest Star Ana Rey Lainie Schmidt Guest Star Clint Culp Roy Baxter 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 Michael Zinberg Director