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Wolfgang Kieling as Commissaris Simon "Piet" van der Valk |
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Catherine Schell as Sophie Ray |
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William Marlowe as Martin Ray |
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Pamela Ann Davy as Elsa de Charmoy |
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Guy Deghy as Will Munch |
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J.A.B. Dubin-Behrmann as Eric |
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Lo van Hensbergen as Magistrate |
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Guido de Moor as Piet Ulbricht |
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Liesbeth Struppert as Dr Tulp |
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Piet Römer as Detective |
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Onno Molenkamp as Henk |
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Erik Plooyer as Baron |
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Trudy de Jong as |
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Will Van Selst as Policeman |
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Peter Burton as Herman Ketelboer |
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André van den Heuvel as Professor Comerius |
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Elisabeth Versluys as Weeping Wife |
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Geert Thijssens as Press |
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Joscik Barbarossa as |
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Rob Kryt as |
| Directing | Gerry O'Hara | Director |
| Production | George Willoughby | Producer |
| Sound | John Scott | Music |
| Production | Howard G. Barnes | Executive Producer |
| Production | William J. Gell | Executive Producer |
| Editing | Barry Peters | Editor |
| Production | John Merrick | Casting |
| Art | Terry Pritchard | Production Design |
| Costume & Make-Up | Tom Smith | Makeup Artist |
| Production | John Bremer | Production Manager |
| Directing | Antal Kovacs | Assistant Director |
| Directing | Thom Noble | Second Unit Director |
| Sound | Maurice Askew | Sound Recordist |
| Camera | David Cadwallader | Grip |
| Camera | Jimmy Turrell | Camera Operator |
| Lighting | Bob Bremner | Lighting Technician |
| Sound | John Scott | Conductor |
| Sound | John Scott | Orchestrator |
