Baron Otto von Kleist / Alfred Becker
Joseph Cotten
Eva Arnold
Elke Sommer
Martha Hummel
Valeria Sabel
Christina Hoffmann
Rada Rassimov
Dr. Karl Hummel
Massimo Girotti
Peter Kleist
Antonio Cantafora
Inspector
Umberto Raho
Fritz
Luciano Pigozzi
Gretchen Hummel
Nicoletta Elmi
Mayor Dortmundt
Dieter Tressler
Auctioner
Rolf Halwich
Dr. Werner Hesse
Gustavo De Nardo
Director
Mario Bava
Director of Photography
Screenplay
Original Music Composer
Stelvio Cipriani
Editor
Carlo Reali
Makeup Effects
Carlo Rambaldi
Executive Producer
Samuel Z. Arkoff
Producer
Alfredo Leone
Art Direction
Enzo Bulgarelli
Vincent Fotre
Hairstylist
Rossana Gigante
Story
James H. Nicholson
J. Arthur Elliot
Willibald Eser
Makeup Artist
Silvana Petri