| Actor | Role |
|---|---|
 Hardy KrügerMichael | Michael |
 Viktor de KowaProfessor Behrens | Professor Behrens |
 Claus BiederstaedtFranz | Franz |
 Fita BenkhoffFrau Hohmann | Frau Hohmann |
 Peer SchmidtRobert | Robert |
 Charles RegnierHerr Borelli | Herr Borelli |
 Käthe HaackFrau Borelli | Frau Borelli |
 Ernst WaldowBrennecke, Michaels Vater | Brennecke, Michaels Vater |
 Margarete HaagenFrau Rose | Frau Rose |
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