Klaus KinskiJohn Alexander Christiane KrügerChristine Günther StollInspektor Steevens Margaret LeeHelen Alexander Luciano SpadoniInspector Gordon / Production Design Fulvio PellegrinoPoliceman (uncredited) Domenico RavennaSpectator at horse race (uncredited) Alfred VohrerEdgar Wallace (voice) (archive footage) (uncredited) Alice Arno(hardcore inserts - French 1976 version) Riccardo FredaReżyseria / Screenplay Oreste ColtellacciProducer Luciano SpadoniInspector Gordon / Production Design Gábor PogányDirector Of Photography Nora OrlandiOriginal Music Composer Gianbattista MussettoStory 
