THX 1138 is a 1971 science fiction film written and directed by George Lucas. It depicts an Orwellian future, featuring three residents of a dystopia in which a high level of control is exerted upon the populace through ever-present faceless, android police-officers and mandatory, regulated use of special drugs to suppress emotion, including sexual desire.

It was the first feature-length film directed by Lucas, and a more developed, feature-length version of his student film Electronic Labyrinth THX 1138:4EB, which he made in 1967 while attending the University of Southern California in Los Angeles. It shares themes with The Machine Stops, Anthem, Brave New World, Nineteen Eighty-Four, and Ira Levin's This Perfect Day; bears a very strong resemblance to Yevgeny Zamyatin's We; and was inspired in part by the short film 21-87. The film was produced in a joint-venture between Warner Brothers and Francis Ford Coppola's then-new production company, American Zoetrope. (Thanks Wikipedia)