THX 1138
- Blwyddyn: 1971
- Gwlad: United States of America
- Genre: Science Fiction, Action, Drama
- Stiwdio: American Zoetrope, Warner Bros. Pictures
- Allweddair: prison, mind control, future, computer, police, dystopia, drug addiction, hearing, totalitarian regime, phasing, subterranean town, hologram, psychological thriller
- Cyfarwyddwr: George Lucas
- Cast: Robert Duvall, Donald Pleasence, Don Pedro Colley, Maggie McOmie, Ian Wolfe, Marshall Efron