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 Marilee Talkington Annie Barth Guest Star Robert Mammana Sheriff Greg Pearson Guest Star James Eckhouse Fred Guest Star Sara Fletcher Louise Cabrisio Guest Star Greg Cromer Webber Silk Guest Star Delon de Metz Petty Officer Thomas Billings Guest Star Matthew Jones Navy Cmdr. Rick Odwalla 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 Brendan Fehily Writer Bethany Rooney Director