| Actor | Role |
|---|---|
 Fritz WepperJohn Taplow | John Taplow |
 Alexander KerstFrank Hunter | Frank Hunter |
 Eva Maria MeinekeMillie Crocker-Harris | Millie Crocker-Harris |
 Howard VernonAndrew Crocker-Harris | Andrew Crocker-Harris |
 Fritz RaspDr. Frobisher | Dr. Frobisher |
 Gunnar MöllerMr. Gilbert | Mr. Gilbert |
 Brigitte RauMrs. Gilbert | Mrs. Gilbert |
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