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 Daniel Jay Shore Petty Officer Benjamin Horlacher Guest Star Cleo King Della Robinson Guest Star Virginia Reece Allison Donovan Guest Star Kristin Proctor 1st Lt. Susan Ellsworth Guest Star Carlos La Camara Joe Tabarez Guest Star Madison Mason Lt. Col. Bushnell Guest Star Mark Adair-Rios Ignacio Mejia "Iggy" Guest Star Tania Raymonde Anna Real Guest Star Anthony Heald Guyman Purcell Guest Star Brian Dietzen Jimmy Palmer Guest Star Donald P. Bellisario Executive Producer Dennis Smith Director Steve Kane Writer