Silo season 3: Everything we know about the upcoming return of the popular Apple TV Plus sci-fi show

On January 17, 2025By Littum

Silo Season 3 is officially underway with cameras already rolling on the next chapter of the hit Apple TV Plus sci-fi show, which is great news considering how thrilling Season 2’s thrilling finale was. Look, it might just be over, but we already want more!

You might already be wondering, has the Season 3 release date been confirmed? Which cast members can we expect to return? Will we finally find out the origin of the silos? What new mysteries will be revealed? Since Silo is based on author Hugh Howey’s trilogy of novels, we know there’s a lot more to tell.

Much of that 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 the beloved show’s return, from the release date to the cast, plot theories to the latest updates on a trailer.

Before you continue, be warned that below we will go into major spoilers for Silo season 2so make sure you are all caught up before proceeding.

Silo Season 3 Release Date Speculations

Tim Robbins as Bernard Holland in Silo Season 2

(Image credit: Apple TV+)

There is currently no release date for Silo Season 3, but we can put on our tinfoil hats and start theorizing.

With cameras now rolling and filming due to end in mid-2025, this means that it will likely be 2026 that we will see the third chapter on the air if it follows the same timings as season 2. However, it should be noted, that they may be filming seasons 3 and 4 back-to-back as both have been ordered, which will extend filming and perhaps lead to a later release date. However, if that is the case, it could lead to an earlier release date for Season 4.

Silo Season 3 Plot Speculations SPOILERS

Rebecca Ferguson as Juliette in Silo Season 2

(Image credit: Apple TV+)

While no official plot details have yet been revealed for Silo Season 3, we can piece together a pretty good idea of where it will be headed based on the second-half finale.

For example, in the final moments, Juliette (Rebecca Ferguson) returned to her home silo after finding a way back from the other one with the help of Solo/Jimmy (Steve Zahn). But at the entrance, she was 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 it on fire.

And that’s where we left the couple, so presumably Silo Season 3 will pick up on the immediate aftermath and tell us their fates. Given that they’re both main characters, it’s likely that the pair will survive, with the third chapter then looking at the consequences of what they’ve learned about the security procedure (basically a tube that can pump poison into the silo that kills all). Juliette teased that she “figured something out,” so we’re sure everything will be clear.

We can also probably expect plenty of fallout after the rebellion, people learning from Juliette what happened to her, and confirmation that the exterior is indeed insecure.

But viewers can also likely expect a twist in the narrative after the thrilling final scene that ended Silo Season 2’s final episode, titled ‘Into the Fire’. In what we can safely assume is 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 likely also look at the origins of the Silos, past times, along with the current timeline. And if you’ve read Howey’s books, you’ll know that it’s actually coming, if the TV show stays true to the novels, of course.

Things add up though, as while Zuckerman’s politician character is unnamed, he matches 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, it seems pretty safe.

With these two characters likely to appear in Silo Season 3, it looks like it won’t be long until we finally unravel the mysteries surrounding who built the silos and why.

Silo season 3 cast speculation

Common as Robert Sims in Silo season 2

(Image credit: Apple TV+)

Considering what happened in the Silo season 2 finale, we can expect some changes with the cast. First, Iain Glen’s sacrificed Dr. Pete Nichols himself so he doesn’t appear 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: an unnamed man (Zuckerman) and a journalist named Helen (Henwick).

As mentioned earlier, if our theory about who these newcomers are is correct, it is likely that they will play a crucial role in Silo Season 3, which will partially depict the origin of the Silos. This means a new cast of characters will be coming into the fold for these scenes, starring alongside our returning favourites.

Based on that speculation, the cast list would look 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 Donald

Silo season 3 trailer speculation

Silo

(Image credit: Apple TV Plus)

A trailer for Silo Season 3 hasn’t been released yet, but considering it only started filming two months ago, that’s hardly a surprise. Additionally, the trailer for Season 2 dropped just a month before that installment hit our screens, meaning we’ll likely have to wait until much closer to the release date for a teaser.

Is Silo season 3 the last season?

Remmie Miller in Silo Season 2

(Image credit: Apple TV+)

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, this is where the bad news comes in as Silo season 4 will actually be the final chapter , with Apple TV Plus announcing the news in December 2024.

In a press release, it revealed that the final two seasons will complete the story told by Howey’s trilogy of novels, with showrunner Graham Yost promising it will satisfy viewers 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 is no suggestion of a release date for Silo Season 3 yet, we also don’t know when Season 4 will arrive. But as soon as we do, we’ll be sure to share it with you!

Silo seasons 1 and 2 can be streamed in their entirety on Apple TV Plus. For more, check out our guide to the best Apple TV shows to add to your watchlist.