The Clangers
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Synopsis: The series chronicled the melancholically funny lives of the Clangers, a flutey-voiced family of woolen, knitted aliens living below the surface of a knobbly little planet far out in space. Their misadventures brought them into contact with such unlikely creatures as the Soup Dragon, the Froglets, the Iron Chicken and the Glow Buzzers.
More info: IMDB