Mark Harmon NCIS Special Agent Leroy Jethro Gibbs Actor Michael Weatherly NCIS Special Agent Anthony "Tony" Dinozzo Actor Cote de Pablo NCIS Special Agent Ziva David Actor Pauley Perrette Forensic Specialist Abby Sciuto Actor Sean Murray NCIS Special Agent Timothy McGee Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Joe Spano Senior FBI Agent T.C. Fornell Guest Star Paul Telfer Damon Werth Guest Star Peter Woodward Devoisier Guest Star Jason Spisak Aaron Szwed Guest Star David St. Louis Gerald Lucas Guest Star Donald P. Bellisario Executive Producer Dennis Smith Director Jesse Stern Writer