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 Jamie Bamber NSA Attorney Jake Malloy Guest Star Adam Campbell Young Donald Mallard Guest Star Adam Croasdell Young Angus Clarke Guest Star Andy Walken Young Nicholas Mallard Guest Star Susan Duerden Lorraine Mallard Guest Star George Gerdes Field Marshal Rand Guest Star Kim Robillard Dwayne Parker Guest Star Jon Beavers Sam Butler Guest Star Henrietta Meire Nurse Cooper Guest Star Nicole J. Butler Coordinator Guest Star Christopher Murray Joseph Mallard Guest Star Sewell Whitney Nicholas Mallard I Guest Star David Carey Foster Nicholas Mallard II Guest Star Tom Billett Viggo Trellis Guest Star Nikki Leigh Woman Guest Star Patrick Quinlan London Bobby Guest Star Ashlynn Yennie Daughter Guest Star Gary Glasberg Executive Producer Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Frank Cardea Executive Producer George Schenck Executive Producer Steven D. Binder Executive Producer, Writer Scott Williams Executive Producer Donald P. Bellisario Executive Producer Terrence O'Hara Director