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 Brian Dietzen Dr. Jimmy Palmer Actor Emily Wickersham Probationary NCIS Agent Eleanor "Ellie" Bishop Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Alice Krige Maggie Clarke Guest Star Adam Campbell Young Donald Mallard Guest Star Adam Croasdell Young Angus Clarke Guest Star Hannah Marshall Young Maggie Guest Star Matt Burns Gareth Godfrey Guest Star Alastair Duncan Peter Velo Guest Star Glenn Taranto Eddie Kowolski Guest Star Cleo Anthony Navy Cmdr. Zachary Bucket Guest Star Nicholas Massouh Ramandi Guest Star Peter Elbling Samuel Colpepper Guest Star Simon James Vendor Guest Star Dustin Quick Young Woman Guest Star Gary Glasberg Executive Producer Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Shane Brennan Executive Producer Donald P. Bellisario Executive Producer Steven D. Binder Writer Leslie Libman Director