Klaus Kinski as John Alexander

Christiane Krüger as Christine

Günther Stoll as Inspektor Steevens

Annabella Incontrera as Liz

Margaret Lee as Helen Alexander

Sydney Chaplin as Mr.Brown

Barbara Nelli as Alice

Ignazio Dolce as

Carlo Marcolino as Servant

Gastone Pescucci as Peter

Luciano Spadoni as Inspector Gordon

Claudio Trionfi as

Bedy Moratti as (uncredited)

Fulvio Pellegrino as Policeman (uncredited)

Domenico Ravenna as Spectator at horse race (uncredited)

Alfred Vohrer as Edgar Wallace (voice) (archive footage) (uncredited)

Alice Arno as (hardcore inserts - French 1976 version)