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 Elisabeth Röhm Mounted Park Police Sgt. May Dawson Guest Star Jimmy Akingbola Liberian Ambassador Gabriel Moore Guest Star Kym Jackson Phoebe Spitz Guest Star Izzy Diaz Nelson Ast Guest Star Kareem J. Grimes Bushmeat Smuggler Guest Star Lorey Hayes Teta Gayflor Guest Star Jason Rodriguez Mounted Park Police Brad Cole 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 Bethany Rooney Director