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The Clangers are peacefully building a house. We hear a whistling sound and down comes something. The Clangers run for cover. The thing is a terrestrial space-probe vehicle with large initials on it. It is a tracked vehicle with appendages. The Clangers watch it begin its investigations. It probes about, beeping and buzzing to itself. It finds a piece of local rock and produces a sort of digging device. It digs up the rock and appears to eat it. This shocks Mr. Clanger who goes out to speak to it.