This stark dystopian science fiction film which was George Lucas' directorial debut is set in a future society under totalitarian rule where the citizenry is under constant surveillance and kept under emotional control by the use of mandatory drugs. Sex is forbidden, and no one is allowed to leave the underground structure that contains their city. Police androids with chrome faces patrol and handle any rebellion with brutal efficiency. The story follows our protagonist, named THX 1138 (Robert Duvall) a factory worker who works with radioactive materials. His assigned roommate is LUH 3417 (Maggie McOmie) a woman who works in the surveillance department. When LUH stops taking her drugs she becomes lucid for the first time and without his knowledge she substitutes THX's pills as well. As their emotions come back LUH and THX begin an illicit relationship. THX soon realizes he can't work his dangerous job without the medication, but will lose what he feels for LUH if he goes back on it. The third option is almost unthinkable; escape. Lucas also wrote the screenplay, in collaboration with Walter Murch.