Wolfgang Kieling
(Commissaris Simon "Piet" van der Valk)
Catherine Schell
(Sophie Ray)
William Marlowe
(Martin Ray)
Pamela Ann Davy
(Elsa de Charmoy)
Guy Deghy
(Will Munch)
J.A.B. Dubin-Behrmann
(Eric)
Lo van Hensbergen
(Magistrate)
Guido de Moor
(Piet Ulbricht)
Liesbeth Struppert
(Dr Tulp)
Piet Römer
(Detective)
Onno Molenkamp
(Henk)
Erik Plooyer
(Baron)
Trudy de Jong
Will Van Selst
(Policeman)
Peter Burton
(Herman Ketelboer)
André van den Heuvel
(Professor Comerius)
Elisabeth Versluys
(Weeping Wife)
Geert Thijssens
(Press)
Joscik Barbarossa
Rob Kryt