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 Sean Patrick Thomas Navy Commander Ian Rackham Guest Star Sloane Morgan Siegel Max Girard Guest Star Griffin Freeman Navy Petty Officer Second Class Eric Brown Guest Star Ashley Liao Hayley Guest Star Cedric Begley Blake Guest Star Teri Wyble Kendra Allston Guest Star Steven Krueger Andrew Townsley Guest Star Chaunsi Heatley Sailor 1 Guest Star Charles A. Remley III Navy Chief 1 Guest Star Jennifer May Navy Chief 2 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