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 Patrick Laborteaux Lt. Bud Roberts Guest Star Brandon Davis Jimmy Guest Star Julie Gonzalo Sarah Schaefer Guest Star Keith Diamond Sgt. Gregory Nutt Guest Star Rick Pasqualone Cpl. Paul Dafelmair Guest Star Dave Power Cpl. Dave Ramsey Guest Star Chaney Kley Cpl. Paul Brinkman Guest Star James MacDonald Capt. Faul Guest Star Lee Reherman Sgt. Tuers Guest Star Brian Patrick Wade Marine Lance Corporal Guest Star Pancho Demmings Gerald Jackson Guest Star Christina Souza Rosemarie Fuentes Guest Star Austin Marques Billy Fuentes Guest Star Donald P. Bellisario Executive Producer Alan J. Levi Director Don McGill Writer