John Carpenter’s 1982 movie The Thing ends with its few remaining characters in a desperate spot. Faced with an alien creature that can infect, assimilate, and emulate human bodies, the survivors don’t know who among them might secretly be an alien, or whether their pyrrhic efforts have eliminated the infection. They’re stranded in the Antarctic with their research base destroyed. Their resources are gone, there’s no meaningful shelter left, they’re freezing to death, and they can’t even trust each other enough to work together.