Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor, Executive Producer Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Brian Dietzen Dr. Jimmy Palmer Actor Emily Wickersham Probationary NCIS Agent Eleanor "Ellie" Bishop Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Joe Spano Senior FBI Agent T.C. Fornell Guest Star Alan Dale Homeland Senior Division Chief Tom Morrow Guest Star Vince Nappo Jacob Scott Guest Star Dan Hildebrand Cassio Chavez Guest Star Kate Vernon Caroline Morrow Guest Star Andy Beckwith HM Prison Service Custodial Manager Chester Grimm Guest Star Douglas Olsson Zaynak Darbenian Guest Star Tiffany Ariany Katie Darbenian Guest Star Jill Czarnowski NCIS Technician 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 Leslie Libman Director