![]() | Man investigates the disappearance of two of his friends who were the guests of a sinister Austrian count. |
| Richard Greene | - | Sir Ronald Burton, alias Richard Beckett |
| Boris Karloff | - | Dr. Meissen |
| Stephen McNally | - | Count Karl von Bruno |
| Rita Corday | - | Countess Elga von Bruno |
| Lon Chaney Jr. | - | Gargon |
| John Hoyt | - | Count Steiken |
| Michael Pate | - | Count Ernst von Melcher |
| Nancy Valentine | - | Therese Von Wilk |