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 Scottie Thompson Jeanne Benoit Guest Star Brian Dietzen Jimmy Palmer Guest Star Armand Assante La Grenouille Guest Star David Dayan Fisher Trent Kort Guest Star Mesrop Agajanyan Henri Rousseau Guest Star Webster Williams Col. Jasper Shepard Guest Star Donald P. Bellisario Executive Producer Thomas J. Wright Director Shane Brennan Writer