Benedict Arnold Brutus CIA man Judas Judas Iscariot Quisling archtraitor betrayer cloak-and-dagger operative cockatrice conniver conspirator conspirer counterintelligence agent counterspy double-crosser double-dealer espionage agent informer inside man intelligence agent intrigant intriguer machinator military-intelligence man naval-intelligence man operative plotter quisling rat reconnoiterer schemer scout secret agent serpent snake spotter spy spy-catcher timeserver traitor treasonist trimmer turncoat undercover man