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 Jennifer Esposito NCIS Special Agent Alexandra "Alex" Quinn Actor Emily Wickersham NCIS Probationary 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 Rafi Silver Qasim Naasir Guest Star Ryan Doom George Bishop Guest Star Jesse Bradford John Bishop Guest Star Jesse Johnson Robbie Bishop Guest Star Aaron Ramzi Amir Hassan Guest Star John Charles Meyer Ronald Ayers, Brendan Peters Guest Star Evan Arnold Gareth Bainbridge Guest Star Jim Abele Col. Holt Driscoll Guest Star Kira Sternbach Liddy Guest Star Charlie Bodin Keith Guest Star Odelya Halevi Samira Hassan Guest Star David Bittick Army Sgt. Tom Healy 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 Jennifer Corbett Writer Tony Wharmby Director