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

Silo season 3 is closer than ever, with the third installment of the hit Apple show due to arrive in 2026. It's only been just over a year since season 2 wrapped up, but it's felt like a long wait.

This is one of the best sci-fi shows on Apple TV, which means its return is very exciting. The streamer is holding details close to its chest in the run-up to the season 3 release, but showrunner Graham Yost and members of the cast have dropped some hints about what might happen in the aftermath of that dramatic Silo season 2 ending.

Below, we've rounded up everything you need to know about Silo season 3, from the potential release date to what the plot might cover and more. Plus, there's an exciting update about season 4, too. So, for all that and more, head to the below. You can also check out our guide to the best new TV shows coming this year.

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, with Apple TV confirming that Silo season 3 will air sometime in 2026.

Filming on the third chapter wrapped in June 2025. However, if season 3 followed the same pattern as season 2, which wrapped filming in March 2024 and hit screens in November 2024, we should have seen Silo season 3 air in February 2026. The slight delay may be due to the fact that seasons 3 and 4 were being filmed back-to-back, which would have extended the shoot. But, season 4 has now wrapped filming, as confirmed by the Apple TV Twitter account.

One thing is for sure, though, Silo better return quickly as the show has already fallen out of Apple TV's top 10 most-popular shows.

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. Given that they are both major characters, it is likely that the pair survive, with the third chapter 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 what happened to Juliette, and confirmation that the outside is indeed unsafe.

However, viewers can also expect a twist in the tale after that intriguing final scene. 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.

Yost recently confirmed that Zuckerman is playing Daniel (although his book counterpart is named Donald), a young congressman who unwittingly becomes the designer of the silos. Zuckerman and Henwick will be series regulars in Silo season 3, so part 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 seaosn 3 cast. Firstly, Iain Glen's Dr. Pete Nichols sacrificed himself, so he won't be returning (unless there are flashbacks, of course). But, more importantly, the very last scene of the second season took us back in time, where we met two new characters: young politician Daniel (Ashley Zuckerman) and a journalist named Helen (Jessica Henwick).

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 and means a new cast of characters will also come into the fold.

Otherwise, Apple TV Plus hasn't confirmed any new or returning cast members just yet, aside from Rebecca Ferguson's Juliette.

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 filming has only recently wrapped, that's hardly a surprise. Plus, the trailer for season 2 dropped only a month before that installment hit our screens, so we'll probably have to wait until much closer to the release date for a teaser.

Is Silo season 3 the final season?

Silo season 3 isn't the end of the road: the show has already been renewed for season 4. However, as announced back in December 2024, Silo season 4 is set to be the last installment in the series.

In a press release, it was revealed that these last two seasons will complete the story told by Hugh Howey's trilogy of novels, with Yost promising that it will satisfy viewers who are longing for answers to "many mysteries and unanswered questions contained within the walls of these silos."

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 movies you need to add to your watchlist.