Fred and Wilma trade roles and Fred must clean the house and make appetizers when visitors come to inspect the house for a contest that Wilma has entered.

Hoppy, the new pet that Barney and Betty got for Bamm Bamm, causes major havoc and nearly ends Barney's friendship with Fred.

Fred reverts to childhood after getting hit on the head with a bowling ball. After looking for a doctor, Barney finds a mad scientist that uses electric shock to swap personalities.