A university chemistry professor experiments with an ancient Mayan gas on a medical student, turning the would-be surgeon into a murdering ghoul as part of a plan to steal his lover.
| Directing | James P. Hogan | Director |
| Writing | Brenda Weisberg | Screenplay |
| Writing | Paul Gangelin | Screenplay |
| Art | John B. Goodman | Art Direction |
| Art | Martin Obzina | Art Direction |
| Sound | Bernard B. Brown | Sound Director |
| Production | Ben Pivar | Associate Producer |
| Camera | Milton Krasner | Director of Photography |
| Costume & Make-Up | Vera West | Costume Designer |
| Writing | Hans Kraly | Original Story |
| Editing | Milton Carruth | Editor |
| Art | Russell A. Gausman | Set Decoration |
| Art | A.J. Gilmore | Set Decoration |
| Sound | Hans J. Salter | Music Director |
| Costume & Make-Up | Jack Pierce | Makeup Artist |
