The Golden Bat

The Ambush (1x47)

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Dr. Makino, the scientist who discovered Gerontium 90, which has the power to nullify gravitational forces, visits Dr. Yamatone. At that time, Makino had already been brainwashed and had become a pawn to lure Doctor Yamatone and his team. As they approach the Gerontium dig site, the earth cracks and a monster appears. Fantaman, who seems to want to exterminate the monsters, is devoured by them. What is the fate of Doctor Yamatone and Fantaman?