"Mr. Smith" reveals to Graham that he is an alien from another world (withholding its name). Later, Graham explains to Dupont, Murray, and Cartwright that "Mr. Smith" is actually an alien emissary from a "Planet X", while also informing them that Laird has gone mad and plans to continue his dangerous experiments. "Mr.Smith" explains that his mission is to warn humanity of the likelihood that Earth's orbit will be destabilized should the magnetic experiments continue. They are already a threat to "Planet X", having caused the crash on Earth of one of their flying saucers. "Mr. Smith" is asked to help stop Dr. Laird, but being an emissary, he is at first reluctant. However, now faced with a continued threat, he agrees. They quickly leave and go back to stop Dr. Laird, who has already started up his equipment. "Mr. Smith" in the meantime has summoned his flying saucer using a hand-held device, positioning it directly above the laboratory. It fires down multiple rays that obliterate the building. With the coming disaster averted, the alien says his goodbyes to Graham and Dupont and walks to the landed saucer. It quickly becomes just an oval of light ascending into the night sky.