The Black Room (1935)Directed by
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| Boris Karloff | ... | Baron Gregor de Bergmann/Anton de Bergmann | |
| Marian Marsh | ... | Thea Hassel | |
| Robert Allen | ... | Lt. Albert Lussan | |
| Thurston Hall | ... | Col. Paul Hassel | |
| John Buckler | ... | Buran the gypsy | |
| Torben Meyer | ... | Peter the majordomo | |
| Katherine DeMille | ... | Mashka | |
| Henry Kolker | ... | Baron de Berghman | |
| Colin Tapley | ... | Paul Hassel as a young Lt. | |
| Edward Van Sloan | ... | Doctor | |
| Egon Brecher | ... | Lead Villager | |
| Helena Grant | ... | Anna the housekeeper | |
| Marion Lessing | ... | Maria the chambermaid | |
| Robert Middlemass | ... | The Prosecutor | |
| Wilfrid North | ... | Member of the Court |
