| Directed by |
Lambert Hillyer |
|
| Cast: | ||
| Dr. Janos Rukh | Boris Karloff | |
| Dr. Felix Benet | Bela Lugosi | |
| Diane Rukh | Frances Drake | |
| Ronald Drake | Frank Lawton | |
| Sir Francis Stevens | Walter Kingsford | |
| Lady Arabella Stevens | Beulah Bondi | |
| Professor Meiklejohn (Mendelssohn in end credits) | Frank Reicher | |
| Ernie Adams | ||
| Bystander | Ricca Allen | |
| Scientist | Edwards Davis | |
| Gendarme | Robert Graves | |
| Rukh's Head Bearer | Daniel L. Haynes | |
| Derelict | Walter Miller | |
| Clinic Valet | Hans Schumm | |
| Bearer with Geiger-Counter | Ray Turner | |
| Briggs | Nydia Westman | |
| Director of photography |
George Robinson |
|
| Produced by |
Edmund Grainger |
|
| Music composed by |
Franz Waxman |
|
| Year: | 1936 | |
| Running time: | 80 minutes | |
| Country: | United States | |
| Language: | English French | |