Text settings Story text Size Small Standard Large Width * Standard Wide Links Standard Orange * Subscribers only Learn more Minimize to nav The critically acclaimed second season of Apple TV’s dystopian sci-fi drama Silo ended on one heck of a cliffhanger, with at least one major character’s fate unclear. The streamer just released the first teaser for S3, in which events from the first two seasons rewind to give us the briefest glimpse of the lushly green, seemingly idyllic early days of the silo community, centuries before.
(Spoilers for the first two seasons below.)
As previously reported, Silo is based on the trilogy by novelist Hugh Howey. It’s set in a self-sustaining underground city inhabited by a community whose recorded history only goes back 140 years. Outside is a toxic hellscape that is only visible on big screens in the silo’s topmost level. Inside, 10,000 people live together under a pact: Anyone who says they want to “go out” is immediately granted that wish—cast outside in an environment suit on a one-way trip to clean the cameras. But those who make that choice die soon after because of the toxic environment.
The few computers are managed by the IT department, run by Bernard Holland (Tim Robbins). The mechanical department keeps the power on and life support from collapsing, and that is where we first met savant Juliette Nichols (Rebecca Ferguson). There are a few (forbidden) relics like mechanical wristwatches or electronics far beyond the technical means of the silo’s current inhabitants, due to a rebellion 140 years ago that destroyed the silo’s records in the process.
The first season opened with the murder of Juliette’s lover, George (Ferdinand Kingsley). Many twists ensued, and Holland was revealed to be a bit of a villain. In the season finale, Juliette made her own outside excursion and realized that their silo was one of many dotted across the barren wasteland; she managed to make it to another silo to survive.
The second season expanded Silo‘s world to incorporate the survivors in the second Silo 17; everyone else died in a revolt to escape to the surface. We discovered that there are 50 silos in all. Meanwhile, another revolution was brewing in Juliette’s original Silo 18 against Holland. Even more secrets were revealed. In the season finale, Juliette returned to her silo and warned the residents not to leave, but she and Holland ended up locked in the incinerator just as it was being fired up.
The final scene was a flashback, showing a woman questioning a congressman in Washington, DC, about possible retaliation after the US dropped a dirty bomb on Iran. And that brings us to S3. Per the official premise:
Season three of Silo continues the saga of a dystopian society of 10,000 people living underground under mysterious circumstances, while revealing an origin story set centuries earlier. In the present, Juliette Nichols (Ferguson) survives her forced ‘cleaning’ but returns with memory loss as the silo recovers from rebellion and faces a dangerous new threat. Meanwhile, in the ‘Before Times,’ journalist Helen Drew (Jessica Henwick) and Congressman Daniel Keene (Ashley Zukerman) uncover a conspiracy that pulls them into a chain of events with catastrophic, irreversible consequences.
So Juliette clearly survived the incinerator; Holland’s fate is still unknown. In addition to Ferguson, returning cast members include Common as head of security Robert Sims; Harriet Walter as agoraphobic electrical engineer Martha; Avi Nash as IT systems analyst Lukas; Rick Gomez as maintenance worker Patrick; Chinaza Uche as chief deputy Paul Billings; Shane McRae as Knox; Remmie Milner as Shirley; Alexandria Riley as Camille Sims; Clare Perkins as Carla; Billy Postlethwaite as Deputy Hank; and Steve Zahn as Jimmy Connor/"Solo,” sole survivor of the Silo 17 rebellion. Other new cast members include Laura Innes, Jessica Brown Findlay, Morven Christie, Reed Birney, Matt Craven, and Colin Hanks in as-yet-undisclosed roles.
The third season of Silo premieres on Apple TV on July 3, 2026, with new episodes airing every Friday through September 4. It has already been renewed for a fourth and final season.
