A flurry of anonymous letters and two suicides leads Inspector Van der Valk to a mission in Drente where small-town hysteria may just lead to one of the century's most wanted criminals.
| Actor | Role |
|---|---|
 Frank FinlayCommissaris Simon "Piet" van der Valk | Commissaris Simon "Piet" van der Valk |
| AAndrée ChampeauxMrs Barkhuis | Mrs Barkhuis |
 Odile VersoisMiss Lindberg | Miss Lindberg |
 Hans Christian BlechBerenson | Berenson |
 Jacques MonodThe Mayor | The Mayor |
 Danièle GirardThe Mayor's wife | The Mayor's wife |
 Vernon DobtcheffReinders | Reinders |
 Eva SimonetBetty Reinders | Betty Reinders |
 Dominique MacAvoyBetty Reinders's sister | Betty Reinders's sister |
 Françoise PrévostArlette van der Valk | Arlette van der Valk |
 Alan AdairThe Prosecutor | The Prosecutor |
| RRené ArrieuThe dairy manager | The dairy manager |