Apple’s dystopian series began not in Hollywood, but with a short story that author Hugh Howey published himself — and that readers refused to let end. In the crowded world of post-apocalyptic television, few series have built a universe quite as claustrophobic — or mysterious — as Silo. The Apple TV drama imagines roughly 10,000 people living inside a massive underground structure, 144 stories deep, generations after humanity apparently became unable to survive on the surfac