Bizarre film. Apparently “Battle in Outer Space” is a sequel to this film, but I don’t exactly see the connection. The Mysterians opens at a Japanese festival, introduces a grumpy scientist, baffles the viewers with a forest fire coming up from the ground… then there’s a big silver robot that comes out of a hillside… it’s a bit convoluted.
For completists only. This is a peculiar film that doesn’t hang together all that well.