One of those Shōwa era appearances was Godzilla vs. Gigan. The plot of that film had a pair of extraterrestrials take over the body of a deceased teacher and his favorite student. Their goal?

The Nebulans had come to Earth with the intent of taking it over and turning it into one of their colonies, but Godzilla put a stop to it. As for Gigan, it would reappear over the years and even ...