Two dim-witted witches turn their sister into a pumpkin and then create chaos in their typical suburban town with their inept attempts to rescue her on Halloween night.

Vampire strikes back: The gang runs into a real life vampire in a Transylvanian castle. Mummy scares best: The gang investigates a mummy on the loose in Egypt. High-tech house of the future: The gang is trapped in a beserk automated house of the future at the Omaha World Fair. She sees a sea monster by the sea shore: The gang's tropical island vacation is ruined by a boat-smashing sea monster.