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 Kasie Hines Guest Star Pej Vahdat Nigel Hakim Guest Star Ivan Hernandez Ray Martin Guest Star Ann Hu FAA Operations Supervisor Heather White Guest Star Chelsea Alden Navy Petty Officer 3rd Class Stephanie Vairo Guest Star Carlin James Navy Seaman Felix Pittorino Guest Star Chris Nelson Norris Marine Capt. Chester Kelb Guest Star Kiff VandenHeuvel Metro P.D. Sgt. Peter Todd Guest Star Alexa Hamilton British Deputy Ambassador Sybil Rigg Guest Star Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Frank Cardea Executive Producer, Writer George Schenck Executive Producer, Writer Steven D. Binder Executive Producer Scott Williams Executive Producer, Writer Donald P. Bellisario Executive Producer Tony Wharmby Director