Johnny Sokko and His Flying Robot

Metron: The Mysterious Spaceman (1x19)

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A saucer-shaped spaceshop approaches Tokyo and lands on a forested hill not very far from the city. However, it lands roughly. When Unicorn rescues a three-eyes alien named Metron, he double-crosses them and suddenly Johnny Sokko and Giant Robot have to deal with the alien and Torozon!