 During the next 11 serial chapters, Cody, now back on Earth, and his associates Joan (Aline Towne), Ted (William Bakewell) and Dick (Gayle Kellogg) battle an elusive lunar agent named Krog (Peter Brocco) and his gang of human henchmen led by Graber (Clayton Moore) and Daly (Bob Stevenson), who use Lunarium-powered ray cannons to disrupt defense forces and weaken public morale.After a second trip to the Moon, in which he captures a sample ray cannon for duplication in his lab, Cody tracks Retik's minions to their hideout where Krog is killed by one of his own devices, and Graber and Daly subsequently die in an over-the-cliff car chase.Retik flies to Earth to take personal charge of his collapsing operations but is blasted out of the sky by one of his own ray weapons.