Frank Finlay

Commissaris Simon "Piet" van der Valk

Judy Winter

Anne-Marie Marchal

Helmut Käutner

Canisius

Hans Helmut Dickow

Stössl

Françoise Prévost

Arlette van der Valk

Marte Harell

Mrs Kramer

Erich Padalewski

Serak

Kees Brusse

Michael Ande

(voice) (uncredited)

Wolfgang Kieling

(voice) (uncredited)

Eva Pflug

(voice) (uncredited)

Thomas Reiner

(voice) (uncredited)

Fritz Tillmann

(voice) (uncredited)