Black Friday
- Ano: 1940
- País: United States of America
- Xénero: Science Fiction, Crime, Horror
- Estudo: Universal Pictures
- Palabra clave: experiment, gangster, professor, murder, mad doctor, car accident, brain surgeon, hidden loot, brain transplant, hidden money
- Director: Arthur Lubin
- Reparto: Stanley Ridges, Boris Karloff, Bela Lugosi, Anne Nagel, Anne Gwynne, Virginia Brissac