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

Silo season 3 is almost here, and the first look is just as ominous as we'd hoped. The hit Apple TV sci-fi series is set to follow a different type of format this season, telling two main storylines over two different timelines.

Silo is among the best sci-fi shows on Apple TV, and we finally have plot details and an official release date for the penultimate season. Be sure to catch up on the Silo season 2 ending so you know where things are headed.

With Silo season 3 arriving this year, we've rounded up everything you need to know about the returning sci-fi show, including when it will premiere on Apple TV, cast, and much more, including an update on season 4. You can also check out our guide to the best new TV shows coming this year.

Silo season 3 release date

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 July 3, 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*

The official synopsis is as follows: "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." We met Helen and Daniel at the very end of season 2, with the "Before Times" taking place centuries prior.

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.