Mandrake the Magician; Lothar; four aliens from Portonoia [Dargo; Felix; Ralph; Professor Beldon]; Narda
Using hurricanes as a cover for their landings, 4 aliens come to Earth and infiltrate humanity. One alien -- who has befriended Mandrake -- realizes their conquest plans will succeed only if Mandrake is eliminated. They trick Mandrake into using his powers on himself, paralyzing him. Narda and Lothar manage to free Mandrake. Then he and Lothar defeat the aliens, making them forget their alien past.