The plot of is this film is incomplete and needs more details. Please help us improve.
- Joseph Cotten as Baron Otto von Kleist/Alfred Becker
- Elke Sommer as Eva Arnold
- Massimo Girotti as Dr. Karl Hummel
- Rada Rassimov as Christina Hoffmann
- Antonio Cantafora as Peter Kleist
- Umberto Raho (credited as Humi Raho) as Inspector
- Nicoletta Elmi as Gretchen Humel
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