Nanny gets her first real problem to confront with the children when she learns that Prudence has been having nightmares about a monster called the wiblet. Trying to convince her it isn't real hasn't worked, and Nanny reminds her father that to Prudence it is real - as real as the monster Nanny confronted when she was a child (the globbamore). As real as the monster the Professor's date (Joanna Moore) dealt with when she was a child (the dinklebilly). The way to defeat the wiblet is to confront it and see how funny it is - which Hal and Butch manage to pull off although not exactly as they planned. Trent Lehman, as Butch, gets a nice round of slapstick comedy in this episode, and Hal invents "the clapper" fifteen years before it was invented and marketed in the real world. As usual, a sweet episode built around real life and a real world family situation.