8 Biggest Revelations in 'Silo' Season 3, Ranked

Image via Apple TV Published Sep 10, 2026, 2:09 PM EDT Christine is a freelance writer for Collider with two decades of experience covering all types of TV shows and movies spanning every genre. With a particular affinity for dramas, true crime, sitcoms, and thrillers, if it's a top TV show, Christine has likely watched it and is eager to share her thoughts. When she's not furiously writing away, you can find her enjoying the next binge obsession with a glass of wine in front of the TV. Sign in to your Collider account Spoiler Alert: This list contains spoilers for Silo Season 3.Apple TV series Silo is closing in on its end, so it makes sense that the penultimate season would have big reveals to set things up for the final season. Season 3 wrapped up in early September, and everything has come to a head with the two timelines following Juliette (Rebecca Ferguson) and Daniel (Ashley Zukerman) finally converging. We have some major answers, including who created the silos and why (at least initially), how Daniel and Helen (Jessica Henwick) are involved, and who or what is behind the mysterious algorithm. So much has come into focus, preparing us for the ultimate end. 8 New Details About the Safeguard Procedure Image via Apple TV The Safeguard Procedure was technically revealed in Season 2 of this addictive sci-fi show when Jimmy (Steve Zahn) recalled hearing his parents talk about it. He knows his mother left to block the pipe, which was located on the floor where she worked. But we learned more about what happened from there in Season 3. Mostly, it's that Jimmy's mother sacrificed her life to save everyone in Silo 17. Once she got to the pipe, she realized that some poison had already leaked out. So, she made the harrowing decision to seal herself inside the tunnel to prevent the toxic fumes from being released and killing others. When Patrick (Rick Gomez) and Lukas (Avi Nash) made it to Silo 17 in present day, they discovered her bones inside, revealing the information. But this also confirmed what they already suspected: sealing the pipe would prevent the Safeguard Procedure. The few people who remained inside Silo 17, including Jimmy, did not perish after the rebellion. 7 The Origins of the Forgetting Drugs Image via Apple TV Matt Craven is introduced in Season 3 as Victor Crnkovich, the creator of the forgetting drugs. A doctor, he began diving full force into his research after falling asleep at the wheel, getting into a major car accident, and losing his family. He felt that altering memories would be a good way to help people cope with grief and trauma, a plotline that is very similar to that of Severance. He experimented on Daniel's sister Charlotte (Jessica Brown Findlay), at first making her forget everything. He then slowly brought back into focus good memories from her childhood, life, and relationship with her brother, but nothing of the mission that almost killed her. Victor's medication was not only pivotal to the events that occurred 300+ years ago, but they also play into the current timeline. As we know, leaders of Silo 18 have been using the forgetting drugs on people. They were first mentioned when Robert Sims (Common) tells Patrick he can give him something to forget about his wife and the pain he feels from her loss. Most notably in Season 3, Jules is being given the forgetting drugs to make her forget what happened when she left the silo, replacing those memories with fake ones. Then, of course, there's Camille (Alexandria Riley) being ordered by The Algorithm to deliver the forgetting drugs to everyone using the water supply. 6 What Happened to the People of Silo 17 Image via Apple TV While we knew about the rebellion in Silo 17, which happened about 35 years prior, the assumption was that everyone who went outside died because of the toxic air. But we learned in the Season 3 finale that Daniel, now going by the name Troy, was awoken from a cryogenic sleep to handle the issue. He had drones fly in the sky and shoot down all the people, suggesting that humanity is doomed. Jimmy mentioned when talking to Juliette in Season 3 that the people who went outside didn't die immediately, which is what they have all been led to believe would happen if they weren't wearing a suit. Now we know that those people were outright murdered, shot dead one by one in sadistic fashion to prevent exposure of the truth. 5 It May Actually Be Safe To Go Outside After All Image via Apple TV Building from that reality, we can now infer that it might actually be safe to go outside. How each person who goes out with a suit dies may either be the result of being quietly shot, out of view of the screen while those in the silo watch, or toxic air being pushed outside only when someone is sent out to clean. Further evidence of this is that when Patrick and Lukas go outside, they are shot at, and Lukas is hit. If Silo 1 was confident they would die anyway, since they likely did not have the same heat tape on their suit that Juliette did, they would have no reason to kill them. This raises serious questions about the purpose of the silo project to begin with. If Per Stensen (Colin Hanks) wanted to do this to save people, why is he having them killed? It may have been more about exerting control and rebuilding a world without personal autonomy and freedom, his own sick and twisted social experiment. Collider Exclusive · Sci-Fi Survival Quiz Which Sci-Fi World Would You Survive? The Matrix · Mad Max · Blade Runner · Dune · Star Wars Five universes. Five completely different ways the future went wrong — or sideways, or up in flames. Only one of them is the world your instincts were built for. Eight questions will figure out which dystopia, galaxy, or desert wasteland you'd actually make it out of alive. 💊The Matrix 🔥Mad Max 🌧️Blade Runner 🏜️Dune 🚀Star Wars TEST YOUR SURVIVAL → 01 You sense something is deeply wrong with the world around you. What do you do? The first instinct is often the truest one. APull on every thread until I understand the system — then figure out how to break it. BStop asking questions and start stockpiling — food, fuel, weapons. Questions don't keep you alive. CKeep my head down, observe carefully, and trust no one until I know who's pulling the strings. DStudy the patterns. Every system has a rhythm — learn it, and you learn how to survive it. EFind the people fighting back and join them. You can't fix a broken galaxy alone. NEXT QUESTION → 02 In a world of scarcity, what resource do you guard most fiercely? What we protect reveals what we believe survival actually requires. AKnowledge. If you understand the system, you don't need resources — you can generate them. BFuel. Everything else — movement, power, escape — runs on it. CTrust. In a world of fakes and informants, a truly reliable ally is rarer than any commodity. DWater. And after water, information — the two things empires are truly built on. EShips and credits. The galaxy is big — you survive it by being able to move through it freely. NEXT QUESTION → 03 What kind of threat keeps you up at night? Fear is useful data — if you're honest about what you're actually afraid of. AThat reality itself is a lie — that everything I experience has been constructed to keep me compliant. BA raid. No warning, no mercy — just the roar of engines and then nothing left. CBeing identified. Once someone with power decides you're a problem, you're already out of time. DBeing outmanoeuvred — losing a political game I didn't even know I was playing. EThe Empire tightening its grip until there's nowhere left to run. NEXT QUESTION → 04 How do you deal with authority you don't trust? Every dystopia has a power structure. Your approach to it determines everything. ASubvert it from the inside — learn its rules well enough to weaponise them against it. BIgnore it and stay out of its reach. The further from any power structure, the better. CAppear to comply while doing exactly what I need to do. Visibility is the enemy. DManoeuvre within it carefully. You can't beat a system you refuse to understand. EResist openly when I have to. Some things are worth the risk of being seen. NEXT QUESTION → 05 Which environment could you actually endure long-term? Survival isn't just tactical — it's physical, psychological, and very much about where you are. AUnderground bunkers and server rooms — cramped, artificial, but with access to everything that matters. BOpen wasteland — brutal sun, no shelter, constant movement. At least the threat is honest. CA dense, rain-soaked city where you can disappear into the crowd and nobody asks questions. DMerciless desert — extreme heat, no water, and something enormous living beneath the sand. EThe fringe — backwater planets and busy spaceports where the Empire's attention rarely reaches. NEXT QUESTION → 06 Who do you want in your corner when things fall apart? The company you keep is the clearest signal of who you actually are. AA tight crew of believers who've seen behind the curtain and have nothing left to lose. BOne or two people I'd trust with my life. Any more than that and someone talks. CNobody, ideally. Alliances are liabilities. I work alone unless I have no choice. DA community bound by shared hardship and mutual survival — people who need each other to last. EA ragtag team with wildly different skills and total commitment when it counts. NEXT QUESTION → 07 Where do you draw the line — if you draw one at all? Every survivor eventually faces a moment that tests what they're actually made of. AI won't harm the innocent — even the ones who'd report me without hesitation. BI do what I have to to protect the people I've chosen. Everything else is negotiable. CThe line shifts depending on who's asking and what's at stake. DI draw a long-term line — nothing that compromises my people's future, even if it'd help now. ESome lines, once crossed, can't be uncrossed. I know which ones they are. NEXT QUESTION → 08 What would actually make survival worth it? Staying alive is one thing. Having a reason to is another. AWaking others up — dismantling the illusion so no one else has to live inside it. BFinding somewhere — or someone — worth protecting. A reason to keep moving. CAnswers. Understanding what I am, what any of this means, before time runs out. DLegacy — shaping the future in a way that outlasts me by generations. EFreedom — for myself, for others, for every world still living under someone else's boot. REVEAL MY WORLD → Your Fate Has Been Calculated You'd Survive In…Your answers point to the world your instincts were built for. This is the universe your temperament, your survival instincts, and your particular brand of stubbornness were made for. The MatrixYou took the red pill a long time ago — probably before anyone offered it to you. You're a systems thinker who can't help but notice the seams in things. You're drawn to understanding how the system works before figuring out how to break it. You'd find the Resistance, or it would find you — your instinct for spotting constructed realities is the machines' worst nightmare. You function best when you have access to information and the freedom to act on it. The Matrix built an airtight prison. You'd be the one probing the walls for the door. Mad MaxThe wasteland doesn't reward the clever or the well-connected — it rewards those who are hard to kill and harder to break. That's you. You don't need comfort, community, or a cause larger than the next horizon. You need a vehicle, a clear threat, and enough fuel to outrun it — and you're good at all three. You are unsentimental enough to survive that world, and decent enough — just barely — to be something more than another raider. In the wasteland, that distinction is everything. Blade RunnerYou'd survive here because you know how to exist in moral grey areas without losing yourself completely. You read people accurately, keep your circle small, and ask the questions others prefer not to answer. In a city where humanity is a legal designation rather than a feeling, you hold onto something that keeps you functional. You're not a hero. But you're not lost, either. In Blade Runner's world, that distinction is everything. DuneArrakis is the most hostile environment in the known universe — and you are precisely the kind of person it rewards. Patience, discipline, and political awareness are your core strengths — and on Arrakis, they're survival tools. You understand that the long game matters more than any single victory. Others come to Dune and are consumed by it. You'd learn its logic and earn its respect. In time, you wouldn't just survive Arrakis — you'd begin to reshape it. Star WarsThe galaxy far, far away is vast, loud, and in a constant state of violent political upheaval — and you wouldn't have it any other way. You find meaning in being part of something larger than yourself — a cause, a crew, a rebellion. You'd gravitate toward the Rebellion, or the fringes, or whatever pocket of the galaxy still believes the Empire's grip can be broken. You fight — not because you have to, but because standing aside isn't something you're capable of. In Star Wars, that willingness is what makes all the difference. ↻ RETAKE THE QUIZ 4 The Creation of the Silos Image via Apple TV Speaking of Per Stensen, he's introduced in the Apple TV show with no weak seasons as a new character this season and revealed to be the architect of the silos. Fearing a nanobot attack from another country, billionaire Stensen sets out to build these silos as a safe place for people to go in the event of one. The idea, as he explained it, was to leak the information about the silos once the build was done in hopes that this would thwart an attack. Why would a country attack knowing citizens could go safely underground and the efforts would be futile? The character diverts from the story in the Hugh Howey novels on which the show is based, which features several influential figures behind the silos instead of one. Stensen was working alongside others, including Victor as well as Senator Rosalind Thurman (Laura Innes). His introduction answered the main overarching question: who created the silos? We also have the why. But as Bernard (Tim Robbins) posed to Juliette before his death, what she needs to find out is the real reason they were created. Because it's either not what Stensen noted in the beginning, or has become something very different since. 3 The Big Blast and Questions Around It Image via Apple TV In the finale, Daniel and Helen are invited with others to tour the silos, which have officially been built. He seemingly goes only to support his sister since she works with the team there. While offered years earlier, Daniel turned down the chance to help with the engineering. Daniel is taken to Silo 1 while Helen is taken to Silo 18, the very same silo where Juliette resides hundreds of years later. As Daniel and Helen emerge from their respective silos, they look at one another from across a hill, talking on the phone. But suddenly, a blast happens, and they are both thrown from their feet. It ends there, and while we know what happens to Daniel, Helen's future hangs in the balance. But at least now we know how the world effectively ended, and that it was likely orchestrated by Stensen, timed perfectly when he had a captive (literally) audience. 2 The Algorithm Is Driven by a Human Image via Apple TV The biggest revelation for Bernard, even bigger than learning about the Safeguard Procedure, is that there is a human behind The Algorithm. After pleading with the supposedly AI voice to allow him to take the heat for all the controversy, which would dub Camille a hero and allow Bernard to live out his remaining days in quiet solitude, he recognizes that the "machine" seems to be frustrated with him. If there's one thing that separates humans from AI, it's emotion. It's at this moment that Bernard realizes it's likely a person, or series of people, behind the voice. We now know that the person behind The Algorithm who was talking to Bernard, and probably the person who has always been behind it, was Victor. It's a huge revelation since The Algorithm has guided every decision that has happened in the silo, including telling Bernard to kill Judge Mary Meadows (Tanya Moodie), having Camille begin the Safeguard Procedure, and even ordering Juliette's death. While there is some computational power behind it, Victor is the one using this information and communicating it to the Head of IT, a harrowing thought. This shakes Bernard to his core, learning that he did horrendous things at the order of someone who is flesh and blood just like him, not a higher being. It's a shame we won't get to see Bernard and Victor come face-to-face. 1 Daniel Has Become Troy Without Even Knowing It Image via Apple TV Seeing Daniel in a different light in this most perfect sci-fi show was jarring, especially when he so coldly orders the murders of people from Silo 17, including innocent women and children. He comes across as ruthless, a shell of his former self. It's clear Victor has dosed him with the forgetting drugs, awakening "Troy" only when he is needed to perform horrible acts and help keep everything status quo. It's Daniel doing these awful things, but it's not really Daniel. Seeing Victor accept defeat in the end, realizing he was duped, and finally relenting to giving Daniel a chance to get his memories back by revealing Helen's name, was heartbreaking. As was Victor's death by suicide. Daniel, starting to remember who he is, will undoubtedly play a huge role in Season 4. But Season 3 finally explained how the mysterious congressman with the Pez dispenser plays into the silos. Silo Release Date May 5, 2023 Network Apple TV Showrunner Graham Yost Directors Morten Tyldum, David Semel, Michael Dinner, Aric Avelino Writers Graham Yost, Hugh Howey, Jeffery Wang, Lekethia Dalcoe Main Genre Sci-Fi Seasons 4 Producers Aric Avelino, Jessica Blaire, Matthew Bird, Ben Brafman, Katherine DiSavino, Joanna Thapa Creator(s) Graham Yost Story By Hugh Howey Streaming Service(s) AppleTV+ Executive Producer(s) Graham Yost, Joanna Thapa, Rebecca Ferguson, Remi Aubuchon, Fred Golan, Hugh Howey, Nina Jack, Morten Tyldum, Michael Dinner, Ingrid Escajeda