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 Patrick Laborteaux JAG Navy Capt. Bud Roberts Jr. Guest Star Kaitlyn Black Navy Lt. Melissa Newhall, Rita Guest Star James Read Alan Newhall Guest Star Gina Hecht Christine Newhall Guest Star Valery M. Ortiz Kerry Lyons Guest Star Brian Hallisay David Crocker Guest Star Nathan Sutton Barry Goode Guest Star Mark Dippolito Sleazy Guy Guest Star John Bader Desk Clerk 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 Donald P. Bellisario Executive Producer Bethany Rooney Director