Black Friday
- Anno: 1940
- Nazione: United States of America
- Genere: Fantascienza, Crime, Horror
- Studio: Universal Pictures
- Parola chiave: experiment, gangster, professor, murder, mad doctor, car accident, brain surgeon, hidden loot, brain transplant, hidden money
- Direttore: Arthur Lubin
- Cast: Stanley Ridges, Boris Karloff, Bela Lugosi, Anne Nagel, Anne Gwynne, Virginia Brissac