| Actor | Role |
|---|---|
 Lilli PalmerConstanze Calonder | Constanze Calonder |
 Peter van EyckDr. Fred Calonder | Dr. Fred Calonder |
 Carlos ThompsonBernard Somerset | Bernard Somerset |
 Agnes WindeckFrau Professor Dietz | Frau Professor Dietz |
 Dorian GrayMarie-Louise Jörgensen | Marie-Louise Jörgensen |
| MMax LichteggSven Jörgensen | Sven Jörgensen |
 Susanne von AlmassyConstanze Middelton | Constanze Middelton |
 Helga FeddersenNot listed | Not listed |
 Amedeo NazzariNot listed | Not listed |
| EElvira SchalcherMartha Dietz | Martha Dietz |
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