Geert Wilders was supposed to be a guest in episode 16.3 (with Cor Bakker), but for his own safety he was unable to come. This episode is the only in the whole series with just one guest. A season later, in episode 17.6, Wilders was a guest and nothing was said about him not showing up a year earlier.
Thomas Acda quit this program in 2000 after his brother Bart died in May of that year because he didn't feel like being funny on television.