The Crimson Stain Mystery
8/21/1916
Imdb: tt0006554
Tmdb: 337387
Popularity: 0.942
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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.