""
Francesco Carnelutti
as Dottor Lauker
Rossano Brazzi
as Commissario Matthäi
Raymond Pellegrin
as Capo della polizia
Macha Méril
as Signora Heller
Erica Beltrami
as
Gisella Burinato
as Signora Moser
Bruno Corazzari
as L'autore
Iris Mazzucco
Marne Maitland
as Von Gunthen
Gianni Pulone
as Signor Moser
Diana Torrieri
as Signora Schrott
Larry Dolgin
as Commissario Feller (uncredited)
Friedrich Dürrenmatt
Novel
Alberto Negrin
Director
Gianfranco Calligarich
Writer
Giulio Albonico
Cinematography
Paolo Boccio
Editor
Egisto Macchi
Music
