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 Abbie Cobb Melanie Keller Guest Star Ian Alda Luke Green Guest Star Judith Moreland Carrie Lewis Guest Star Jeryl Prescott Annie Sullivan Guest Star David Paluck Director Glenn Webb Guest Star Bill O'Neill Zach Guest Star Luke Jones Manny Barnes Guest Star Shel Bailey Big Bouncer Guest Star Adam Kaiz Telemarketer 1 Guest Star Lisa Dring Telemarketer 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 David J. North Writer Alrick Riley Director