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 Jon Cryer Dr. Cyril Taft Guest Star Scottie Thompson Jeanne Benoit Guest Star Laura San Giacomo Dr. Grace Confalone Guest Star David Chisum Dr. David Woods Guest Star Michael Cram ATF Special Agent Earl Kitt Guest Star Jodi Harris Catherine Taft Guest Star Alice Hunter Navy Petty Officer 1st Class Janet Shor Guest Star Walter Fauntleroy Navy Petty Officer 1st Class Lamar Finn Guest Star Max E. Williams Louis Shekian Guest Star Catherine Kamei Ella 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 Scott Williams Executive Producer, Writer Donald P. Bellisario Executive Producer Alrick Riley Director