Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Cote de Pablo NCIS Special Agent Ziva David Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Paula Newsome Jackie Vance Guest Star Kelly Hu Lee Wuan Kai Guest Star Todd Lowe NCIS Special Agent Chad Dunham Guest Star Lindy Booth Amanda Barrow Guest Star Penny Johnson Joanne Torrence Guest Star Alla Korot Linda DeMarco Guest Star Theodore Perkins Army Cadet Clay Waring Guest Star Leonard Wu Navy Midshipman Alex Delapena Guest Star Kent Shocknek Guy Ross Guest Star Donald P. Bellisario Executive Producer James Whitmore Jr. Director Gary Glasberg Writer