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 Mitch Pileggi U.S. Secretary of Defense Wynn Crawford Guest Star Scott William Winters CIA Officer Westley Clark Guest Star Kasey Mahaffy Doctor Patton Hartgrave Guest Star Angela Elayne Gibbs Eden Penzance Guest Star Lauren Sweetser Macy Grant Guest Star Kent Shocknek ZNN News Anchor Guy Ross Guest Star Steve Tom George Ashley Green Guest Star Kimberly Daugherty Maid of Honor Guest Star Chance Denman Best Man Guest Star Katie Von Till Pamela Juventas 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 Leslie Libman Director