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 Kelli Williams NCIS Special Agent Maureen Cabot Guest Star Liz Holtan Navy Ensign Holly Farrell Guest Star Titus Makin Jr. Navy Ensign Thomas Burke Guest Star Andrew Lukich Cmdr. Louis Wexler Guest Star Mike Foy Eddie Patch Guest Star Adam Clark Fred Johnson Guest Star Justin Prentice Navy Ensign Michael Fox Guest Star Chastity Dotson Navy Lt. Monica King Guest Star Miles Gaston Villanueva Navy Lt. jg. John Alexander Guest Star Scott Beehner Milton Guest Star Anthony Tyler Quinn Navy Cmdr. Clarence Daniels Guest Star Burt Grinstead Navy Lt. jg. William Greco Guest Star Joseph Whipp Old Man Guest Star Gary Glasberg Executive Producer Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Shane Brennan Executive Producer Donald P. Bellisario Executive Producer Scott Williams Writer Arvin Brown Director