Cast
Frank Finlay
Commissaris Simon "Piet" van der Valk
Eva Pflug
(voice) (uncredited)
Fritz Tillmann
(voice) (uncredited)
Judy Winter
Anne-Marie Marchal
Marte Harell
Mrs Kramer
Erich Padalewski
Serak
Wolfgang Kieling
(voice) (uncredited)
Helmut Käutner
Canisius
Françoise Prévost
Arlette van der Valk
Kees Brusse
Hans Helmut Dickow
Stössl
Michael Ande
(voice) (uncredited)
Thomas Reiner
(voice) (uncredited)