Frank Gardner

Eddie comes home from school an tells the family that he must bring a pet for his class' annual pet contest. Since the ferocious and gigantic dog, refuses to leave his hiding place under the stairs and the cat is too common of an animal, Eddie decides to bring Grandpa's pet bat, Igor.

While the Munster family are at a drive-in movie, two college students visit the house and decide it would be the perfect setting for a fraternity initiation. Not realizing that the house is occupied, the boys agree to force two pledges to spend the night there as part of the initiation ceremony.