Silohas quietly become the crown jewel of Apple TV’s science fiction lineup, and that’s saying something for the platform that houses Severance and Foundation. Graham Yost’s adaptation of Hugh Howey’s novels spent its first two seasons exploring the mystery of a 10,000-person society sealed inside an underground tower, before the Season 2 finale expanded the story with a flashback to pre-apocalypse Washington, D.C. The closing stretch introduced two new faces, Jessica Henwick and Ashley Zukerman, whose characters hold the keys to how the silos came to exist in the first place.

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