The story “Gods of the Underground” is part of the “Rulers of the World” cycle, which includes two more science fiction stories “What’s Worse than Death” and “The Evil Genius of Dietrich Proust.” The mad professor Dietrich Proust, in an effort to rule the world, plunges the planet into a nuclear abyss. However, the brilliant scientist John Harris creates an immortal clone of his student Hughes, who saves humanity.