Tim visits his penfriend Piet van Helder in Holland. Piet has a kid sister named Aanike. Tim throws away a raw herring, which lands in the megaphone of a man, who is guiding British tourists in a channel boat. Confused he drops his walking stick into the water. The children later fishes it up and they discover that a valuable diamond bracelet was hidden inside. The guide actually belongs to a gang of diamond thieves.
Director: Derek Williams.
Stars: Sean Scully, Walter Randal, Thom Kelling, Jacques Verbrugge, Sandra Spurr, Riek Schagen, Jean Lemaire, John Soer, Paul Ostra, Sacco van der Made, Gerard Doting, Frans Kokshoorn, K. Brouwer, John Rowden.