Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor, Executive Producer Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Rocky Carroll NCIS Director Leon Vance Actor Brian Dietzen Dr. Jimmy Palmer Actor David McCallum Dr. Donald "Ducky" Mallard Actor Margo Harshman Delilah Fielding Guest Star Augustus Prew Anton Markin Guest Star Patrick Mulvey Meylo Guest Star Mac Brandt Jake Spoke Guest Star Samantha Quan Amy Lyndon Guest Star Andrew Friedman Martha's Partner Guest Star Sherri Parker Lee Martha Guest Star Dylan Gelula Young Marie Markin Guest Star Wes McGee Navy Petty Officer 1st Class Andrew Wells Guest Star Susan Spano Marie Markin Guest Star Gary Glasberg Executive Producer Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Shane Brennan Executive Producer Donald P. Bellisario Executive Producer Christopher Silber Writer Arvin Brown Director