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 Taye Diggs Gunnery Sgt. Aaron Davis Guest Star Laura San Giacomo Dr. Grace Confalone Guest Star Samantha Logan Riley Davis Guest Star Maureen Sebastian Elaine Dodd Guest Star Paul Bartholomew Spencer Dodd Guest Star Christopher Goodman NCIS Special Agent Michael West Guest Star Gary Glasberg Executive Producer, Writer Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Frank Cardea Executive Producer George Schenck Executive Producer Steven D. Binder Executive Producer Scott Williams Executive Producer Donald P. Bellisario Executive Producer Gina Lucita Monreal Writer Tony Wharmby Director