A man from 2459 spends all his money building a time machine and so he travels to Fort Knox in 1959 to steal all the gold. His time machine disappears, and when his personal force field runs out, he is imprisoned by the locals.; An American spy spots a Martian ship off the coast, but it turns out to be a Soviet trick. He is lauded as a hero for stopping the Russians, but the next time a spaceship appears the Americans immediately fire, only to find that it was a real alien ship that now flees, never to make contact.; A burglar in the 31st century is sentenced to lifetime solitary confinement. He is taken to a spaceport, where he escapes in an automated rocket that will never return to Earth, thinking that he has evaded the sentence and might one day land on another planet. This was the plan all along, since this enlightened society leaves even the worst criminals hope.; A miser in the future hides his money on a remote asteroid. He carefully maps the location of the money on the asteroid, but realizes once he returns to Earth that he cannot find the asteroid that he landed on.; A space traveller many times larger than everyone else lands and carefully explores the area, accidentally causing some damage and fear. He leaves because of this, and goes home to Earth, thinking that they will need to be careful to deal with these tiny people.