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 David McCallum Dr. Donald "Ducky" Mallard Actor David Andriole Lt. Cmdr. Robbins Guest Star Julian Bailey Petty Officer Ronald Zuger Guest Star Mark Sivertsen Cmdr. Rivers Guest Star Elizabeth Morehead Medical Corpsman Guest Star Kieran Mulroney Lt. Reynolds Guest Star Brooks Almy Mrs. MacDonald Guest Star Eamon Hunt Chief Petty Officer Morris Guest Star Colin Bain Ensign Ray Guest Star Bradley Snedeker Petty Officer Carnahan Guest Star Yvonne Delarosa Clerk Guest Star Michael McLafferty Kyle Guest Star Jeni C. Wilson Lisa Guest Star Jeff Peterson Brad Guest Star Donald P. Bellisario Executive Producer Alan J. Levi Director Darcy Meyers Writer