简要：When the Viking capsule suddenly returned to Terrestrial Time from a long time ago trip to Mars, it brought a smart visitor, which is part of "Mars"; Aliens "; And some "; ET";. It is wrapped in armor, with a human figure protruding from its shell to examine its surroundings and show interest in humans, including gentle caressing of a female scientist before the military killed it. This will only irritate its brothers and sisters.
