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 Christopher Lloyd Joseph "Joe" Smith Guest Star Oeter Nyrbuj Navy Four-Star Admiral Michael Caplinger Guest Star Jessica Tuck Gloria Caplinger Guest Star Sebastian Sozzi Kevin Deacon Guest Star Dawn Matthews Doctor Alice Jelani Guest Star Sofie Calderon Joan Guest Star Damian Joseph Quinn Young Joe Guest Star Zachary Cowan Charred Sailor 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 James Whitmore Jr. Director