Black Friday
- År: 1940
- Land: United States of America
- Sjanger: Science Fiction, Crime, Horror
- Ettromsleilighet: Universal Pictures
- Nøkkelord: experiment, gangster, professor, murder, mad doctor, car accident, brain surgeon, hidden loot, brain transplant, hidden money
- Regissør: Arthur Lubin
- Cast: Stanley Ridges, Boris Karloff, Bela Lugosi, Anne Nagel, Anne Gwynne, Virginia Brissac