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 Drew Carey John Ross Guest Star Jake Busey Whit Dexter Guest Star Arienne Mandi Emma Sweeney Guest Star Jaymes Butler Tom Moore Guest Star Joanna Leeds Molly Guinn Guest Star Kirk Baltz Bob Sweeney Guest Star Jake Allyn Navy Petty Officer 2nd Class James Sweeney Guest Star Shaun Clay Navy Petty Officer 3rd Class Albert Dale Guest Star Mike Maolucci Clyde Sweeney Guest Star Tyler Parks Navy Petty Officer 3rd Class Gordon Cooper 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 Donald P. Bellisario Executive Producer Scott J. Jarrett Writer Matthew R. Jarrett Writer Alrick Riley Director