Prudence (Kim Richards) is having nightmares about a monster called Wiblet. Nanny (Juliet Mills) encourages the concept, much to Professor Everett's (Richard Long) dismay. She tells Prudence ways to make the Wiblet appear and in a way that makes the creature seem silly, effectively losing its terror for the child. Prudence's brothers Hal (David Doremus) and Butch (Trent Lehman) unsuccessfully uses a frightening mask to trick her and Nanny. When the professor goes out to dinner with a colleague Dr. Alice Miller (smoky-voiced Southern beauty Joanna Moore, "Touch of Evil") they return to chaos. Could the Wiblet really exist in an unexpected form? There is a nice tactic of dealing with a child's nightmares, but otherwise I found this episode a little difficult in keeping my interest.