In a ruined and toxic future, thousands live in a giant silo deep underground. After its sheriff breaks a cardinal rule and residents die mysteriously, engineer Juliette starts to uncover shocking secrets and the truth about the silo.
Where to watch
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Apple TV
see all options Availability data: JustWatch
- Seasons
- 4
- Episodes aired
- 30
- Latest aired
- S03E10
- Total runtime
- 1d 2h
Timeline when each season aired
- Season 1 May 2023 – June 2023 10 episodes
- Season 2 November 2024 – January 2025 10 episodes
- Season 3 July 2026 – September 2026 10 episodes
- Season 4 July 2027 1 episode
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S03E01 Who Are You?
July 2 · 56min find the promo
Show synopsis
New mayor Juliette can't remember anything from her time outside—or her past.
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S03E02 It's All Good
July 9 · 51min find the promo
Show synopsis
Billings investigates a disappearance. Daniel Keene has a run-in with a reporter.
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S03E03 A Dark Web
July 16 · 49min find the promo
Show synopsis
Juliette takes control of her recovery process. Helen suffers consequences of her investigation.
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S03E04 Whatever You Do, Don't Go Home
July 23 · 48min find the promo
Show synopsis
The race to evade Camille leads Juliette to a shocking discovery. Daniel seeks help from a friend.
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S03E05 Memory
July 30 · 52min find the promo
Show synopsis
The events following Juliette's return come to light—and unexpected allies are made.
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S03E06 The Drive
August 6 · 55min find the promo
Show synopsis
Billings and Hank stumble on a new mystery. Daniel and Helen receive a surprising proposition.
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S03E07 Radio
August 13 · 55min find the promo
Show synopsis
Juliette sends Lukas and Kennedy on a mission, as a desperate Camille threatens Robert to tell the truth.
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S03E08 Gray Goo
August 20 · 56min find the promo
Show synopsis
Knox's father Gus comes clean about a secret. Charlotte makes a life-changing decision.
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S03E09 Farewell
August 27 · 62min find the promo
Show synopsis
The entire silo is stunned by an announcement from Camille. Daniel and Helen attend a special event.
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