The Variable Man’s description included references to a post-nuclear apocalypse Earth, and a man from the past. Whatever I expected from that sparse summary, it was not what the story proved to be. The fact that the Earth set piece happened to have undergone a nuclear apocalypse (at least five of them, actually) is really something of a footnote, one of those throw-away world-building tidbits, like villius flowers, that don’t really add to the plot or the substance of the story, and exist only to create a more full-fleshed world. As for the man from the past…that’s where things got interesting.
