Akos Von Rathony Director Adrian Hoven Insp. Frank Dorin Actor Karin Field Karin Schumann Actor Erika Remberg Maria Actor Wolfgang Preiss Prof. von Adelsberg Actor Emmerich Schrenk Thomas - the Deaf One Actor John Kitzmiller John - Black Servant Actor Laci Cigoj Actor Vida Juvan Actor Kurt Roecken Screenwriter Ákos Ráthonyi Producer Hrvoje Saric Cinematographer Klaus Dudenhöfer Film Editing Herbert Jarczyk Original Music Ivan Pengow Production Design Milena Kumar Costume Design