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

Rudolf Strobl

Tappeiner

Otto Ambros

Portier

Emmerich Schrenk

Cab driver

Fritz Widhalm-Windegg

Attorney

Kees Brusse

Horst Butschke

Peter Frick

Fritz Hakl

Sepp Löwinger

Adolf Lukan

Tilman Röhrig

Rudolf Rösner

Heinz Schacht

Heinrich Strobele

Michael Ande

(voice) (uncredited)

Paul Bürks

(voice) (uncredited)

Wolfgang Kieling

(voice) (uncredited)

Eva Pflug

(voice) (uncredited)

Thomas Reiner

(voice) (uncredited)

Fritz Tillmann

(voice) (uncredited)