Cast
- Hans Stüwe as Kriminalkommissar Bremer
- Hans Brausewetter as Kriminalkommissar Braun
- Gerda Maurus as Irene Matthes
- Veit Harlan as Otto Weigandt
- Ludwig Stössel as Der Varieté-Agent
- Otto Wallburg as Karl Matthes
- Hermann Vallentin as Kriminalrat Kipping
- Hugo Fischer-Köppe as Matrosen-Emil
- Otto Reinwald