The Bubblemen launch an attack in their bubbleships to obtain guiena pigs for their experiments and manage to grab Zandor and Tara. Dorno sneaks into the Bubblemen's underwater city through the whirlpool entrance and he and Gleep free his parents from the leader, Brotac. Zok knocks out some of the pursuing ships, Gloop rescues Zandor and his family when they crash, Igoo and Tundro knock out the remaining ships, and Zok seals the whirlpool entrance once and for all.
Elenco: Don Messick , Virginia Gregg , Mike Road , Sparky Marcus , Ted Cassidy , Ted Eccles .