The Sludge Monster from the Earth's Core
Show: A Pup Named Scooby-Doo --> Season: 1 - Season 1
AirDate: 9/17/1988
Runtime: 23
Voting: 5 (1)

Overview: The Coolsville bank is robbed. The janitor says that he saw a monster in the vault but nobody believes him and he is accused of the robbery. He's proven right when Scooby finds the monster inside his doghouse.