Cast
- Francesco Carnelutti as Dottor Lauker
- Rossano Brazzi as Commissario Matthäi
- Raymond Pellegrin as Capo della polizia
- Macha Méril as Signora Heller
- Erica Beltrami
- Gisella Burinato as Signora Moser
- Bruno Corazzari as L'autore
- Iris Mazzucco
- Marne Maitland as Von Gunthen
- Gianni Pulone as Signor Moser