In attempting to develop a chemical which would make a person super-intelligent, Dr. Montrose fails and the subjects of his experiments metamorphose into hideous monsters who band together and prey on humans. With the police stymied, a young detective attempts to track down the leader of the group of killers, known only to have a small crimson stain in one eye.
Unfortunately the movie The Crimson Stain Mystery is not yet available on Disney Plus.
| Directing | T. Hayes Hunter | Director |
| Writing | Albert Payson Terhune | Writer |
