In 19th Century Paris, a maniac abducts young women and injects them with ape blood in an attempt to prove ape-human kinship but constantly meets failure as the abducted women die.
| Writing | Dale Van Every | Screenplay |
| Writing | Robert Florey | Adaptation |
| Crew | John Huston | Additional Dialogue |
| Directing | Robert Florey | Director |
| Writing | Tom Reed | Screenplay |
| Production | E.M. Asher | Associate Producer |
| Art | Herman Rosse | Set Designer |
| Directing | Joseph A. McDonough | Assistant Director |
| Editing | Milton Carruth | Editor |
| Directing | Scott R. Beal | Assistant Director |
| Directing | Charles S. Gould | Assistant Director |
| Crew | John P. Fulton | Special Effects |
| Camera | Karl Freund | Director of Photography |
| Art | Charles D. Hall | Art Direction |
| Production | Carl Laemmle Jr. | Producer |
| Costume & Make-Up | Jack Pierce | Makeup Artist |
| Writing | Ethel M. Kelly | Writer |
| Sound | C. Roy Hunter | Recording Supervision |
| Crew | Joe Bonomo | Stunt Double |
| Editing | Maurice Pivar | Supervising Editor |
| Sound | Gilbert Kurland | Music Supervisor |
| Sound | Heinz Roemheld | Music |
| Crew | Carl Laemmle | Presenter |
| Writing | Richard Schayer | Scenario Writer |
| Crew | Howard Salemson | Technical Advisor |
| Writing | Edgar Allan Poe | Short Story |
