Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor, Executive Producer Sean Murray NCIS Special Agent Timothy McGee Actor Emily Wickersham NCIS Special Agent Eleanor "Ellie" Bishop Actor Wilmer Valderrama NCIS Special Agent Nicholas "Nick" Torres Actor Maria Bello Special Agent Jacqueline "Jack" Sloane Actor Brian Dietzen Dr. Jimmy Palmer Actor Diona Reasonover Forensic Scientist Kasie Hines Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Charlie Robinson Ray Jennings Guest Star Dee Wallace Claire Hall Guest Star Fred Dryer Retired Marine Master Sergeant Thomas Fletcher Guest Star Amaris Davidson Olivia Guest Star Steve Olson Dylan Guest Star Cayden Boyd Marine First Lieutenant Danny Hall Guest Star Cameron Cowperthwaite Young Marine Corporal Thomas Fletcher Guest Star Brett Gipson Guard Sam Guest Star Demetrius Hodges Young Marine Lance Corporal Ray Jennings Guest Star Juliette Hanover Granddaughter 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 Gina Lucita Monreal Writer Michael Zinberg Director