After witnessing a spacecraft landing Steve Rogers (played by Randal Kleiser) switches to Captain America to investigate. He see a strange alien mutant (played by Bob Burns) leaving the craft. At first Captain America attempts to talk to the alien, only to be attacked. During the fight, the alien drops its ray gun, then knocks Captain America unconscious. The alien stoops to kill Captain America, but the Captain revives, grabs the ray gun and shots the alien, which vaporizes the creature. The Earth is safe again thanks to Captain America.