The New Scooby and Scrappy-Doo Show - Season 2 Episode 3 Scooby's Peep-Hole Pandemonium
Overview: The gang is hired to interview the reclusive Norma Deathman, who lives with her monstrous servants. Since she is having a birthday party, the gang disguises themselves as caterers in order to gain entry to her house, but when Deathman realizes who the gang actually is, they have to run for their lives from her and her monsters.