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 Jack Conley Metro P.D. Detective Danny Sportelli Guest Star Susan Blakely Cadence Darwin Guest Star Lauren Stamile Metro P.D. Detective Michelle Lane Guest Star Carter MacIntyre Benjamin "Benny" Sitano Junior Guest Star Mustafa Speaks Omar Nitro Guest Star Travis Wester Metro P.D. Detective Miles Higgins Guest Star Amy Letcher Fiona Guest Star Alexander Davis Landon Pottorf Guest Star Adam Faison Alastair Guest Star Tyler Lueck Man Who Proposes Guest Star Megan Sheehan Woman Who Says No 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 Christopher J. Waild Writer Terrence O'Hara Director