Jon Haljan pilots the Earth-Moon Mailship. While on vacation, he receives a startling message from Professor Grant requesting they meet, but not revealing why. When Jon arrives, he is greeted by Freddie Blake and his sister, Linda Blake. Professor Blake tells the group he they must travel to the planet Vulcan and return with “Uranium-X”. Added to the crew before departure are Pete Dugan and Bill Falk who plot against the main crew. Linda expresses her distrust for Bill and Pete to Jon and Freddie, but Jon and Freddie dismiss her concerns. They land the ship on the side of Vulcan not facing the sun and begin to search for Uranium-X, which Jon discovers quickly with detection equipment. Bill and Pete dig for the element, with Jon supervising. The crew put on their helmets as the heat and air become intolerable. They begin to load canisters of Uranium-X onto their ship when Linda is attacked by one of the Monsters of Living Flame. The creatures die out quickly, permitting the crew to finish loading the canisters. Bill and Pete reveal their plan, to kidnap Linda who will fly the ship back to Earth, leaving Freddie and Jon stranded on Vulcan. They lure Linda aboard the ship and grab her. When Jon and Freddie arrive, the ruffians threaten to kill Linda. They close the hatch and force Linda to take off. The flame monsters attack Jon and Freddie as they cling to the wings of the spacecraft. The pair climb into a port Bill and Pete hadn’t closed yet. When in space, they confront the pair. Dugan tries to push Jon out the hatch but Freddie and Jon persevere. Bill and Pete fall out the hatch into space. Jon and Freddie can’t save the pair.
Description Jon Haljan pilots the Earth-Moon Mailship. While on vacation, he receives a startling message from Professor Grant requesting they meet, but not revealing why. When Jon arrives, he is greeted by Freddie Blake and his sister, Linda Blake. Professor Blake tells the group he they must travel to the planet Vulcan and return with “Uranium-X”. Added to the crew before departure are Pete Dugan and Bill Falk who plot against the main crew. Linda expresses her distrust for Bill and Pete to Jon and Freddie, but Jon and Freddie dismiss her concerns. They land the ship on the side of Vulcan not facing the sun and begin to search for Uranium-X, which Jon discovers quickly with detection equipment. Bill and Pete dig for the element, with Jon supervising. The crew put on their helmets as the heat and air become intolerable. They begin to load canisters of Uranium-X onto their ship when Linda is attacked by one of the Monsters of Living Flame. The creatures die out quickly, permitting the crew to finish loading the canisters. Bill and Pete reveal their plan, to kidnap Linda who will fly the ship back to Earth, leaving Freddie and Jon stranded on Vulcan. They lure Linda aboard the ship and grab her. When Jon and Freddie arrive, the ruffians threaten to kill Linda. They close the hatch and force Linda to take off. The flame monsters attack Jon and Freddie as they cling to the wings of the spacecraft. The pair climb into a port Bill and Pete hadn’t closed yet. When in space, they confront the pair. Dugan tries to push Jon out the hatch but Freddie and Jon persevere. Bill and Pete fall out the hatch into space. Jon and Freddie can’t save the pair.
