As a combined military and scientific entourage observes the dome, a voice calls out to request five scientists, including Dr. Adachi, who is among the observers, to come to the dome for a conference. The men agree to this meeting and are formally ushered into the dome, where the Mysterians, a scientifically advanced humanoid alien race, list their demands from the people of Earth: a two-mile-radius strip of land and the right to marry women of Earth. The reason for this is that 100,000 years ago their planet—Mysteroid, once the fifth planet from the sun—was destroyed by a nuclear war. Some Mysterians were able to escape to Mars before their planet was rendered unhabitable. However, owing to the nuclear war, strontium-90 has left 80 percent of the aliens' population deformed and crippled. The proposed interbreeding with women on Earth would produce healthier offspring and keep their race alive. The latter part of their demands is downplayed, as they admit to already taking three women captive and reveal two others that they are interested in, one of which is Etsuko.