Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Cote de Pablo NCIS Special Agent Ziva David Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Lauren Holly NCIS Director Jenny Shepard Actor David McCallum Dr. Donald "Ducky" Mallard Actor Brian Dietzen Jimmy Palmer Guest Star Susanna Thompson Army Lt. Col. Hollis Mann Guest Star Corin Nemec Len Grady Guest Star Alexandra Lydon Natalie Dalton Guest Star Philip Anthony-Rodriguez Former Marine Lance Cpt. Lloyd Jackson Guest Star Brian Markinson Marine EOD Sgt. Dan Trask Guest Star Chris Tardio Kenneth Dixon Guest Star Brian Cousins Jacob Torrance Guest Star Erinn Bartlett Madeline Torrance Guest Star Donald P. Bellisario Executive Producer James Whitmore Jr. Director Jesse Stern Writer