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 Brian Dietzen Jimmy Palmer Guest Star Betsy Brandt P.O. Barbara Swain Guest Star Matt Carmody Chaplain Brett Evans Guest Star Tara Buck P.O. Debra Marshall Guest Star Kate Hodge NCIS Agent Jane Melankovic Guest Star Gerard O'Donnell Lt. Cmdr. Scott Willis Guest Star Michael Canaan M.P. Guest Star Spencer Garrett Cmdr. Spencer Guest Star Kendall Clement Foreman Guest Star Blayne Weaver P.O. Darrell Baum Guest Star Donald P. Bellisario Executive Producer Gil Grant Writer Dennis Smith Director