Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor Sasha Alexander NCIS Special Agent Caitlin Todd Actor Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor David McCallum Dr. Donald "Ducky" Mallard Actor Danica McKellar Erin Kendall Guest Star Brian Dietzen Jimmy Palmer Guest Star Conor Dubin Jeremy Pryor Guest Star Jack McGee Det. Curtis Floyd Guest Star Christopher Stapleton Lt. Don Wade Guest Star Alana Stelling Petty Officer Meg Walker Guest Star Colleen Porch Jill Meyers Guest Star Tina Lifford Dr. Pamela Fox Guest Star Donald P. Bellisario Executive Producer James Whitmore Jr. Director George Schneck Writer Frank Cardea Writer