| Release Date | 29 February 1940 |
| Tagline | A Reign Of HORROR... a man-made monster on the loose! |
| Genre | Drama, Horror, Sci-Fi, Crime |
| Country | USA |
| Language | English |
| Sound Mix | Mono |
| Color | Black and White |
| Film Type | Feature |
| Film Class | Psychological Thriller |
| Themes | Mad Scientists, Doctors and Patients, Mind Games, Mental Breakdown |
| Tones | Tense, Chilly, Claustrophobic, Eerie |
| Tags | Body Parts, Brain, Brain Transplant, Business, Death, Dr. Jekyll, Evil, Experiment, Flashback, Gangster, Gas Chamber, Mad Scientist, Monster, Mr. Hyde, Professor, Revenge, Transformation, Transplant |
Black Friday is a 1940 American science fiction film starring Boris Karloff. Béla Lugosi, although second-billed, has only a small part in the film and does not appear with Karloff.