Episode 10 of the Forgotten Kaiju Project brings us to Toho Studio's 1956 science fiction film "The Mysterians". This is the fourth true Kaiju film, following Gojira, Gamera: the Giant Monster, and Rodan. It introduces us, however briefly, to Moguera the giant robot monster, which is seen in several later Godzilla films. This movie has decent technical work in terms of good set design, good pyro, decent model work etc, and it has interesting story elements. We discuss its impact on the kaiju genre, its good and bad story elements, and the things that make this movie both a success and a failure simultaneously.