Heather Locklear appears on the show and tries to prove that she's a sweet person (as opposed to her character on Melrose Place). But problems begin when Heather eats Dr. Bunsen Honeydew's experimental mood-altering snack foods, dividing her between "Good" and "Evil" Heather. Bunsen and Beaker try to solve the problem by hypnotizing Heather to switch personalities whenever she hears two tapping sounds in a row...right before Heather has to go onstage for a final number featuring a tapping cane. The problem is eventually solved with the "Troutanoggin technique" (otherwise known as smacking someone in the head with a fish).