Cast
- Hilde Krahl as Madame
- Viktor de Kowa as Professor Angelot
- Alexander Golling as Kriminalrat Dr. Maurer
- Hans Nielsen as Dr. Peter Krüger
- Viktor Staal as Ernest Harrington
- Rudolf Fernau as Adrian van Zanten
- Franz Muxeneder as Bill
- Hubert von Meyerinck as Meister Philippe
- Beppo Brem as Gepäcksträger
- Gitta Lind as Sängerin