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 Garrett M. Brown Retired Marine General James Wallace Guest Star Doug Savant Marine Brigadier General Daniel Kent Guest Star Erin Cummings Marine Major Ellen Wallace Guest Star Cassandra Creech Amy Tano Guest Star Andrew Bilgore Franklin Morrison Guest Star J. Teddy Garces Omar Lewis Guest Star Danielle Demski ZNN Newscaster Guest Star J.J. Hawkins DOD Cyber Engineer Taylor Southard 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 Jennifer Corbett Writer Michael Zinberg Director