Fraggle Rock: The Animated Series S01 E01 No Fraggle is an Island

Boober gets "fed up" because Fraggle Rock is too crowded, so he and the other Fraggles decide to move far away in order to live alone. But once a Giant Slurp takes over the deserted Fraggle Rock, the lonely Fraggles rally to reclaim their home so they can all live together again.