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 Salli Richardson-Whitfield Carrie Clark Guest Star Johann Urb U.S. Park Police Sgt. Burt Moore Guest Star Laura Seay Anna Dillon Guest Star Dohn Norwood Fairfax County P.D. Sgt. Sherman T. Harper Guest Star Lou Ferrigno Jr. Dave Lancellotti Guest Star Cameron Deane Stewart Ben Koss Guest Star Blake Hood Bennett Jermaine Guest Star Karl T. Wright John Hicks Guest Star Anthony C. Hill Navy Petty Officer 3rd Class John Blaney "JB" Hicks Guest Star Samantha Boscarino Mary LaFleur Guest Star Sergio Enrique Marine Guest Star Gary Glasberg Executive Producer Chas. Floyd Johnson Executive Producer Mark Horowitz Executive Producer Shane Brennan Executive Producer Donald P. Bellisario Executive Producer Dennis Smith Director