The Scooby-Doo Show Season 1 Episode 10
A Frightened Hound Meets Demons Underground (Scooby-Doo): Seattle, Washington is ravaged by evil demons.
The Wizard of Ooze (Dynomutt): The super pair meets Swamp Rat and Mudmouth, two evil swamp monsters determined to turn Big City into a swamp.
Serie: The Scooby-Doo Show
Episode Title: The Frightened Hound Meets Demons Underground / The Wizard of Ooze
Air Date: 1976-11-13