A teenager working at an amusement park to help support his family is kind to a mysterious boy, and finds himself rewarded with a real trip to outer space.
Murdock invents a serum that will preserve his brain even though his body appears dead because he hopes to avoid atomic war that is impending. Peace breaks out and scientific advances occur that allow immortality, but Murdock lies in a coffin appearing dead but really just thinking, immobile.
An alien marries a homely Earth girl who is treated cruelly by those around her and gives her a ring that will protect her when the rest of his invasion force lands.
A researcher looking to accelerate the life span of mice succeeds, but because he was exposed to the process as well, his son is dead from old age two weeks after his birth, and he is aging rapidly too.