Son Kees's childlike stupidity makes him believe St. Nicholas ("Sinterklaas") is real. Since 2011, actor Stefan de Walle plays St. Nicholas every year in Sinterklaasjournaal (2001) and during the St. Nicholas's official arrival in Intocht van Sinterklaas (1967) (TV), making him more or less the official Sinterklaas actor in the Netherlands.
This final episode of season 3 was shot during the production of Flodder 3 (1995), which was meant to mark the end of the series. The episode was filmed on the set that was specifically created for the movie.