✓ Correct! 144 levels. Mayor Jahns lives on Level 1, IT is on Level 34, Judicial on Level 13, Supply in the Mids, and Mechanical sits at the bottom around Level 140. The spiral staircase has no elevator — porters spend their entire working lives on it. The number mirrors Hugh Howey’s source novel and the show’s production bible.

✗ Wrong shaft. The answer is 144 levels, a number lifted straight from Hugh Howey’s Wool books and preserved by showrunner Graham Yost. Mayor and Judicial live up top on Levels 1-20, IT sits in the middle at 34, and Mechanical — where Juliette works — is buried near the bottom around 140. Porters do almost nothing but climb.

✓ Correct! Rebecca Ferguson — Ilsa Faust in the Mission: Impossible films and Lady Jessica in Dune Parts One and Two. She also executive-produces Silo, signed a multi-year development deal with Apple, and has called Juliette one of the most demanding roles of her career. Her performance anchors every episode of the series.

✗ Wrong cast. The answer is Rebecca Ferguson. She’s also an executive producer on Silo, which is why the series is so Juliette-focused from the pilot onwards. Rosamund Pike, Zoe Saldaña and Charlize Theron have all done sci-fi leads, but Silo is Ferguson’s show — a natural extension of the tough, grounded, slightly haunted women she played in Mission: Impossible and Dune.

✓ Correct! Hugh Howey. He published the first Wool novelette on Amazon in 2011 while working as a bookseller, refused a traditional publisher’s print deal that asked for digital rights, and negotiated one of the most famous indie-author print-only contracts ever signed. The trilogy (Wool, Shift, Dust) has sold millions and the Apple show retained him as a consulting producer.

✗ Wrong stack. The answer is Hugh Howey. Andy Weir wrote The Martian and Project Hail Mary. Pierce Brown writes Red Rising. Blake Crouch wrote Dark Matter and Recursion. Howey famously built the Wool books episode by episode on Kindle self-publishing, went viral, and kept his digital rights when a publisher came calling — a case study in the indie author movement.

✓ Correct! “Cleaning.” Exiles are given a helmet, protective suit and a wool pad, then sent outside to wipe the silo’s external sensor lens so everyone inside can keep seeing the “view.” Almost everyone cleans, even the ones who swore they wouldn’t — a mystery the series gradually unpacks. The suits are famously not what IT claims they are.

✗ Wrong verdict. The answer is “Cleaning.” Anyone who says “I want to go out” is granted their wish — they get a suit, a helmet, a wool pad, and a walk to the external sensors. They’re expected to wipe the lens so the silo can keep watching the outside world before the toxic air kills them. And almost everyone, mysteriously, does it.

✓ Correct! Apple TV+. The show slots neatly into Apple’s prestige sci-fi bench alongside Severance, For All Mankind and Foundation, and Hugh Howey’s involvement as consulting producer was a key part of the pitch. Apple renewed Silo through Season 4 before Season 2 even aired — an unusually early greenlight that locked in the show’s complete run.

✗ Wrong stairwell. The answer is Apple TV+. The show premiered May 5, 2023 and Apple committed to the complete four-season run early — the same kind of long-leash deal they gave Severance and For All Mankind. Netflix, Prime and Max have their own dystopian shows, but Silo is pure Apple: polished, slow-burn, auteur sci-fi.

✓ Correct! David Oyelowo. The Selma star opens the series as Holston Becker — a sheriff three years into grieving his wife Allison’s cleaning, who finally asks to be sent out himself. His decision to walk off into the hills rather than clean the sensors is the cliffhanger that triggers Juliette’s promotion and the show’s central mystery.

✗ Wrong badge. The answer is David Oyelowo. He’s on for the entire first episode as Sheriff Holston and returns in flashbacks later in the run. Tim Robbins plays the terrifying Head of Judicial Bernard Holland (spoiler: not just Judicial). Common plays deputy Paul Billings. Idris Elba is not in the show at all — though that would be a good call.

✓ Correct! A hard drive. George — really George Wilkins, played by Ferdinand Kingsley — had been quietly collecting pre-silo tech, and the hard drive he hid contains files Judicial and IT will kill to keep buried, including evidence about what the outside world really looks like. It’s the thread Juliette pulls that unravels the whole first season.

✗ Wrong relic. The answer is an old hard drive, hidden inside a pressure-sealed case in George’s workshop. The drive contains outlawed pre-silo files — including data that suggests the “view” everyone in the silo trusts is not what it appears. Juliette recovers the drive after George’s death and that single clue drives the entire first season’s investigation.

✓ Correct! Graham Yost — the Canadian writer-producer who wrote the Speed screenplay in 1994 and then spent decades as a prestige TV showrunner on Band of Brothers, The Pacific, Justified, The Americans and Sneaky Pete. Hugh Howey stayed on as consulting producer, and Yost has been candid about streamlining the Wool timeline for a four-season Apple run.

✗ Wrong writers’ room. The answer is Graham Yost. Damon Lindelof runs Lost, Watchmen and The Leftovers. David Benioff co-created Game of Thrones. Ronald D. Moore made Battlestar Galactica and For All Mankind (also on Apple). Yost brought his Band of Brothers / Justified sensibility — taut, ensemble, procedural — to Howey’s dystopia.