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 Cote de Pablo Ziva David Guest Star Mouzam Makkar Mira Sahar Azam Guest Star William O'Leary Chief Martin Freydano Guest Star Darri Ingolfsson Dwight Colton Guest Star Rich Hutchman Deputy Andrews Guest Star Teddy Lane Jr. Deputy Barney Guest Star Paul Gregory Senator McCormick Guest Star Cherie Jimenez Senator Ortega Guest Star Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Frank Cardea Executive Producer George Schenck Executive Producer Steven D. Binder Executive Producer, Writer Scott Williams Executive Producer Donald P. Bellisario Executive Producer Tony Wharmby Director