Cast & Crew
-
Bela LugosiDr. Melcher / Monsieur Colomb - Joan BarclayAlice Saunders
- Clayton MooreFBI Agent Richard 'Dick' Martin
- George PembrokeDr. Bill Saunders
- Robert FrazerAmos Hanlin
- Ed Peil Sr.Philip Wallace
- Robert FiskeRyder
- Kenneth HarlanFBI Chief Colton
- William NighDirector
- Jack DietzProducer
- Sam KatzmanProducer
- Harvey GatesWriter