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 Tim DeKay Sen. Patrick Kiley Guest Star Susan Floyd Lynn Tripp Kiley Guest Star Marcus Chait Cole Erickson Guest Star William Bumiller Adm. Charles Graves Guest Star Bill Sage Reed Talbot Guest Star Sheila E. Frazier Debra Green Guest Star Sara Sanderson Tiffany Guest Star Jeff Barnett David Guest Star Donald P. Bellisario Executive Producer Dennis Smith Director George Schenck Writer Frank Cardea Writer