A film edited together for American television from films #7, #8 and #9 of the 1957/1958 Japanese Super Giant serial film series. The film concerns Starman's efforts to save the Earth from the followers of Balazar, an evil genius from the planet Zemar whose prodigiously overdeveloped brain has been preserved after his own assassination.

References:
https://en.wikipedia.org/wiki/Evil_Brain_from_Outer_Space