Tonton Streaming Super Friends (1973) S1E9 - The Balloon People

A family of aliens from the planet Balunia leave their polluted planet for a home on Earth. After their flying saucer lands, the balloon people are befriended by the Super Friends. However, the news reports of these unusual guests prompt ambitious scholar Noah Tall to devise a plan to capture the balloon people. When they're kidnapped, the Super Friends must rescue them.