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 Don Lake Retired Navy Captain Phillip Brooks Guest Star Daphne Zuniga Navy Commander Stacy Gordon Guest Star Andy Comeau M.P.D. Detective Tom Logan Guest Star Brynn Thayer Adams County Sheriff's Department Sheriff Mary Talbot Guest Star Brian Ames Matthew Duques Guest Star Desi Dennis-Dylan Sloane Jackston Guest Star Caroline Whitney Smith Molly Guest Star Bryce McBratnie Chet 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 Marco Schnabel Writer Michael Zinberg Director