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 Connor Trinneer James Dempsey Guest Star Rodney Scott Brian Dempsey Guest Star Alex Nesic Alex Rudd Guest Star Tamara Taylor NCIS Special Agent Cassie Yates Guest Star Tim Russ Jerry Kemper Guest Star Stephanie Mello Cynthia Sumner Guest Star Donald P. Bellisario Executive Producer James Whitmore Jr. Director David J. North Writer