Before I Hang
- Blwyddyn: 1940
- Gwlad: United States of America
- Genre: Crime, Horror, Science Fiction
- Stiwdio: Columbia Pictures
- Allweddair: experiment, mad scientist, murder, doctor, pianist, pardon, split personality, anti-aging, mercy killing, convicted murderer, youth serum
- Cyfarwyddwr: Nick Grindé
- Cast: Boris Karloff, Evelyn Keyes, Bruce Bennett, Don Beddoe, Edward Van Sloan, Ben Taggart