The Baron and his cronies steal a precious crown and hide in a secret room of an abandoned castle. With the help of their tiny robot Robin, Bassie and Adriaan set out to find the crown and return it to the museum.

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Main Cast: Bas van Toor, Aad van Toor, Paul van Gorcum, Joop Dikmans, Dick Rienstra, Theo van Woerden, Jan Buitenga, Arie Blokland, Jan Doets, Ina van Toor

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