A doppia faccia

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)