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 Scott William Winters Westley Clark Guest Star Tara Holt Sheba Nicholas Guest Star J.D. Walsh Leonard Finnik Guest Star Minerva García NCIS lawyer Taylor Hanna Guest Star Naomi Grace Kayla Vance Guest Star Dionne Gipson Mallory Guest Star Sharon Gardner Physical therapist Ava Guest Star Kent Shocknek ZNN News Anchor Guy Ross Guest Star Julien Ari Walt Fergus Guest Star Lana McKissack Edie Samples Guest Star Sylvia Kwan Gwen Eisley Guest Star Cameron Radice Navy Petty Officer First Class Todd Nicholas Guest Star Zach Tinker David West 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 Brendan Fehily Writer Leslie Libman Director