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 Lauren Holly NCIS Director Jenny Shepard Actor David McCallum Dr. Donald "Ducky" Mallard Actor Brian Dietzen Jimmy Palmer Guest Star Shaun Toub Khalid Mohammed Bakr Guest Star Jonathan LaPaglia FBI Special Agent Brent Langer Guest Star David Haydn-Jones Marine Capt. Jim Mills Guest Star James Parks Ryan Sikes Guest Star Jennifer Hetrick Dr. Donna Dunlap Guest Star Walid Amini Marine Lance Corp. Abdul Bakr Guest Star Fred Toma Sunni Man Guest Star Colin Bucksey Director Reed Steiner Writer