Dr. Janos Rukh discovers a certain type of radium that has almost magical healing properties. But the element has a dangerous side, too, and it has already started affecting Rukh. Consumed by paranoia, he begins to suspect that his wife is having an affair. Wild for revenge, Rukh hatches a deadly plot...using his own poisoned body as a weapon to kill.
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| Writing | Howard Higgin | Original Story |
| Directing | Lambert Hillyer | Director |
| Writing | John Colton | Screenplay |
| Camera | George Robinson | Director of Photography |
| Sound | Charles Carroll | Sound Recordist |
| Production | Camille Collins | Production Secretary |
| Sound | Franz Waxman | Original Music Composer |
| Editing | Bernard W. Burton | Editor |
| Crew | Raymond Lindsay | Special Effects |
| Production | Edmund Grainger | Producer |
| Production | Fred S. Meyer | Executive Producer |
| Writing | Douglas Hodges | Story |
| Sound | Gilbert Kurland | Sound Supervisor |
| Costume & Make-Up | Otto Lederer | Makeup Artist |
| Costume & Make-Up | Jack Pierce | Makeup Artist |
| Art | Albert S. D'Agostino | Art Direction |
| Visual Effects | John P. Fulton | Visual Effects |
