The Scooby-Doo/Dynomutt Hour

Season 1, Episode 30

Episode Title: The Lighter Than Air Raid

Air Date: 1976-12-11

Overview:

While the daring duo enjoy a leisurely game of golf, an evil genius known as "The Blimp", places his blimp lair high over Big City's head, messing with the city's supply of helium.