Klaus Kinski
John Alexander
Christiane Krüger
Christine
Günther Stoll
Inspektor Steevens
Margaret Lee
Helen Alexander
Sydney Chaplin
Mr.Brown
Barbara Nelli
Alice
Carlo Marcolino
Servant
Gastone Pescucci
Peter
Luciano Spadoni
Inspector Gordon
Bedy Moratti
(uncredited)
Fulvio Pellegrino
Policeman (uncredited)
Domenico Ravenna
Spectator at horse race (uncredited)
Alfred Vohrer
Edgar Wallace (voice) (archive footage) (uncredited)