Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor, Executive Producer Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Wilmer Valderrama NCIS Special Agent Nicholas "Nick" Torres Actor Jennifer Esposito NCIS Special Agent Alexandra "Alex" Quinn Actor Emily Wickersham NCIS Probationary Agent Eleanor "Ellie" Bishop Actor Brian Dietzen Dr. Jimmy Palmer Actor Duane Henry MI6 Officer Clayton Reeves Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Margo Harshman Delilah Fielding Guest Star Andrea Luna Grano Navy Cmdr. Eleadora Rey Guest Star Andrew Bowen Merrick Gomer Guest Star Wilmer Calderon Wayne Cribbage, Tiger Dad Guest Star Michael McMillian David Kemmons Guest Star Madalyn Horcher Navy Seaman Jennifer Baxter Guest Star Mike Wade Navy Petty Officer 1st Class Tyrell Brown Guest Star Darin Toonder Curt Shapiro Guest Star Hayley Erin Kasey Powers Guest Star Mary Gallagher Betty Baxter Guest Star Taj Speights JaVale Brown Guest Star Michele Panu Kirstin Hoyle Guest Star Jason David Brock Gomer Guest Star Gary Glasberg Executive Producer 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 Christopher J. Waild Writer Terrence O'Hara Director