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 Laura San Giacomo Grace Confalone Guest Star Hugo Armstrong NCIS Inspector General Eugene Coyle Guest Star Max Adler Luke Stana Guest Star Rickey Eugene Brown Navy Petty Officer Third Class Ed Thomas Guest Star Nancy Linehan Charles Ruthann Harrison Guest Star Amrapali Ambegaokar July Wunderman Guest Star Nikki Crawford Dr. Shawna Street Guest Star Jordan Murphy Navy Commander Ben Randall Guest Star Marcos Favela Navy Petty Officer Third Class Carlos Garcia 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 David J. North Writer Diana Valentine Director