Silo season 3 is officially on the way, with filming already taking place for the next installment of the hit Apple TV Plus sci-fi show, which takes viewers to the down deep. Following the thrilling season 2 finale, we already can't wait to return to this dystopian world – and we bet you can't, too.
In fact, you may already be asking yourself, is there a Silo season 3 release date? Who will be in the cast? Will we finally find out why the silos were built and who is behind them? Will new mysteries be uncovered? Given that Silo is based on author Hugh Howey's trilogy of novels, we already know that there is plenty left to tell, especially since we have been promised that the show will cover the whole book series. Much of which will be revealed in the upcoming Silo season 3, which should be on your radar if it isn't already.
Below, we dive into everything we know so far about one of the best TV shows on streaming return, from its potential release date to cast and plot theories to the latest updates on a trailer.
Before you continue, be warned that below, we go into major spoilers for Silo season 2, so make sure that you are all caught up before continuing.
Silo season 3 release date speculation
There is currently no Silo season 3 release date, but we know that it's definitely on its way. We also have enough information to get our tinfoil hats on and start theorizing.
With cameras now rolling and filming due to finish mid-2025, that means it will likely be 2026 that we will see the third chapter air, if it follows the same timings as season 2. However, they are filming seasons 3 and 4 back-to-back, given that both have been commissioned, which will extend the shoot and perhaps lead to a later release date.
The bright side to that, though, is that it might lead to an earlier Silo season 4 release date. Showrunner Graham Yost recently revealed that all of both seasons 3 and 4 have already been written, so at least the scripts are all ready to go. Fingers crossed, then the shoot faces no delays!
Silo season 3 plot speculation *SPOILERS*
Although no official plot details have been revealed yet for Silo season 3, we can put together a pretty good idea of where it will be heading based on the finale of the second installment.
For instance, in the final moments, Juliette (Rebecca Ferguson) returns to her home silo after finding a way back from the other one with help from Solo/Jimmy (Steve Zahn). However, at the entrance, she is confronted by a frustrated Holland (Tim Robbins) who, quite frankly, has had enough. The two have a tense confrontation before getting stuck in the airlock together, which sets on fire.
And that's where we left the pair, so presumably, Silo season 3 will pick up in the immediate aftermath, letting us know their fates. Given that they are both major characters, it is likely that the pair survive, with the third chapter then looking at the consequences of what they have learned about the safeguard procedure (basically a pipe that can pump poison into the silo, killing everyone).
Juliette did tease that she "figured something out" so we are sure all will become clear. We can also likely expect plenty of fallout following the rebellion, people learning from Juliette what happened to her, and confirmation that the outside is indeed unsafe.
However, viewers can also expect a twist in the tale too after that intriguing end scene that concluded Silo season 2's final episode, titled 'Into the Fire'. In a flashback, we met an unnamed man (Ashley Zuckerman) and a journalist, Helen (Jessica Henwick), as they discussed a radioactive "dirty bomb" attack on the US from Iran.
Now, you don't introduce these actors for nothing, so Silo season 3 will also probably look at the origins of the silos, the before times, alongside the current timeline. And if you have read Howey's books, you will know that is indeed incoming, if the TV show stays true to the novels, of course.
Things are aligning as whilst Zuckerman's politician character is unnamed in the show, he matches up with Donald Keene from the books, a young congressman who unwittingly becomes the designer of the silos. Given that Donald's wife is named Helen, which is Henwick's character name, that seems pretty certain.
That theory was proven to be correct with the show's creator, Yost, recently confirming that Zuckerman is indeed playing Donald, although for the series, he will be named Daniel to avoid any political connotations. It was also announced that Zuckerman and Henwick will be series regulars in Silo season 3, telling us that much of the upcoming chapter will be set in the past as we finally unravel the mysteries surrounding who built the silos and why.
Silo season 3 cast speculation
Given what happened in the Silo season 2 finale, we can expect some changes with the cast. Firstly, Iain Glen's Dr. Pete Nichols sacrificed himself so he won't be appearing, unless there are flashbacks where he can be included. But more importantly, the very last scene of the second season took us to the past, where we met two new characters: young politician Daniel (Zuckerman) and a journalist named Helen (Henwick).
We previously theorized that after their cameos these two actors would join the cast of Silo season 3, which is indeed what is happening. Shortly after the season 2 finale aired, it was confirmed that both Zuckerman and Henwick would be reprising their roles in the third season as series regulars. They will play crucial parts in Silo season 3 which will partly depict the origins of the silos. That means a new cast of characters will also come into the fold for these scenes, starring alongside our returning favorites.
Of course no other new cast member has yet been announced, so we will have to keep our eyes peeled. In fact, Apple TV Plus haven't even revealed which returning stars will appear, aside from Ferguson's lead Juliette of course.
However, based on our speculation, we think the cast list will look something like this:
- Rebecca Ferguson as Juliette
- Steve Zahn as Solo/Jimmy
- Tim Robbins as Bernard Holland
- Common as Robert Sims
- Alexandria Riley as Camille Sims
- Harriet Walter as Martha Walker
- Claire Perkins as Carla
- Chinaza Uche as Paul Billings
- Rick Gomez as Patrick Kennedy
- Shane McRae as Knox
- Remmie Miller as Shirley
- Avi Nash as Lukas Kyle
- Jessica Henwick as Helen
- Ashley Zuckerman as Daniel
Is there a Silo season 3 trailer?
A trailer for Silo season 3 hasn't been released yet, but given that it only started filming a few months ago, that's hardly a surprise. Plus, the trailer for season 2 dropped only a month before that installment hit our screens, meaning we will likely have to wait until much closer to the release date for a teaser.
Is Silo season 3 the final season?
The good news is that Silo season 3 won't be the last we see of the show, as it has already been renewed for season 4. However, that's where the bad news comes in as then Silo season 4 will indeed be the last chapter, with Apple TV Plus announcing the news in December 2024.
In a press release it revealed that these last two seasons will complete the story told by Howey's trilogy of novels, with showrunner Yost promising that it will satisfy viewers who are longing for answers to the show's "many mysteries". In a statement he said: "With the final two chapters of Silo, we can’t wait to give fans of the show an incredibly satisfying conclusion to the many mysteries and unanswered questions contained within the walls of these silos."
Because there's no word yet on a Silo season 3 release date, we don't know when season 4 will arrive either. But as soon as we do, we'll be sure to share it with you!
Silo seasons 1 and 2 are available to stream in full on Apple TV Plus. For more, check out our guide to the best Apple TV shows you need to add to your watchlist.
