A: Los Angeles, California, United States, B: San Francisco, California, United States
In 1968 American writer Philip K. Dick published his science fiction novel, Do Androids Dream of Electric Sheep? It told of the moral crisis of Rick Deckard, a bounty hunter who stalked androids—robots visually identifical to people—in a fall-out clouded, dystopic, partially deserted San Francisco.
In 1982 the novel was brought to the screen as Blade Runner, with its location changed to Los Angeles.