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 Brian Dietzen Dr. Jimmy Palmer Actor Rocky Carroll NCIS Director Leon Vance Actor David McCallum Dr. Donald "Ducky" Mallard Actor Matt L. Jones NCIS Probationary Agent Ned Dorneget Guest Star Mathew St. Patrick Metro Detective Bill Shard Guest Star Paul Cassell Bart Crowley Guest Star Jay Acovone Frankie Dean Guest Star Keir O'Donnell Ramsey Boone Guest Star Andrea Bogart Melissa Tourney Guest Star Dio Johnson Marine Lance Cpl. Douglas Alexander Guest Star Jamie Hill Fuller Chloe Chandler Guest Star Donald P. Bellisario Executive Producer George Schenck Writer Frank Cardea Writer James Whitmore Jr. Director