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Foundation Season 3 Release Date, Cast and Season 4 Status

Foundation season 3 is complete: it premiered July 11, 2025, ended September 12, and is streaming on Apple TV+. Here is the confirmed season-four news, cast information, story setup, and book connection.
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Foundation season 3 is already available. It premiered on Apple TV+ on July 11, 2025, and its 10-episode weekly release concluded on September 12, 2025. Apple has renewed the series for season 4, but no official season-four premiere date has been announced.

Foundation season 3 is already available. It premiered on Apple TV+ on July 11, 2025, and its 10-episode weekly release concluded with the finale on September 12, 2025. The next chapter is season 4: Apple renewed the science-fiction drama on September 11, 2025, but has not announced an official season-four premiere date.

Foundation season 3 release date and schedule

Apple launched Foundation season 3 globally on Friday, July 11, 2025. The season contains 10 episodes, released one per week. That schedule ended on Friday, September 12, 2025.

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That distinction matters because older search results may still describe season 3 as “upcoming” or give only its premiere date. The season is now complete. Readers who want to watch the full run should look for all 10 season-three episodes on Apple TV+, subject to regional availability and the viewer’s access plan.

Is Foundation season 3 streaming now?

Yes. Season 3 is available through Apple TV+, Apple’s subscription streaming service, with availability and catalog access potentially differing by country or region. Apple’s official episode archive identifies the season-three premiere and its subsequent episodes as available through Apple’s TV service.

There is no need to wait for a weekly rollout: the complete season finished releasing on September 12, 2025. Apple’s current service naming and local availability should be checked directly before subscribing, since pricing, trials, bundles, and access conditions can change.

What is Foundation season 3 about?

Season 3 opens 152 years after the events of season 2. In that period, the Foundation has become more established, while the Cleonic Dynasty’s Empire has weakened. The political balance between the two powers has therefore changed significantly.

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The Foundation and the Empire form an uneasy alliance in response to the Mule, a warlord whose threat is not limited to conventional military power. Apple’s description presents the Mule as a dangerous figure with both physical force and mind-control abilities. The season’s central conflict consequently brings together political calculation, large-scale warfare, and the more intimate danger of manipulation.

The principal returning figures include Hari Seldon, Gaal Dornick, the Cleons, and Demerzel. The season-three premiere is titled A Song for the End of Everything, and its official synopsis describes the Mule as a mysterious new pirate with terrifying abilities. That is enough to establish the season’s direction without spoiling its later developments.

Foundation season 3 cast

The established core remains led by Jared Harris, Lee Pace, and Lou Llobell. The continuing ensemble also includes Leah Harvey, Laura Birn, Terrence Mann, Cassian Bilton, and Alfred Enoch. David S. Goyer was identified by Apple among the series’ creative leadership, including as showrunner for the show’s established run.

Returning and established performers

  • Jared Harris
  • Lee Pace
  • Lou Llobell
  • Leah Harvey
  • Laura Birn
  • Terrence Mann
  • Cassian Bilton
  • Alfred Enoch

Season 3 additions

Skydance and Apple announced a substantial group of season-three additions, including Cherry Jones, Brandon P. Bell, Synnøve Karlsen, Cody Fern, Tómas Lemarquis, Yootha Wong-Loi-Sing, and Leo Bill.

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Apple also highlighted Alexander Siddig, Academy Award winner Troy Kotsur, and Pilou Asbæk among the new stars and characters. These names establish the scale of season 3’s expanded cast, but an appearance in season 3 should not be treated as confirmation of a season-four return.

Foundation season 4: renewal, production and release date

Foundation season 4 is officially happening. Apple announced the renewal on September 11, 2025, and said production was set to begin in early 2026.

Apple also announced a change in the show’s leadership for the fourth season. Ian Goldberg and David Kob were named season-four co-showrunners and executive producers. David S. Goyer remained among the executive producers named in the renewal announcement.

What has not been announced is a season-four premiere date. A production start window is not the same as a streaming date: filming, post-production, visual effects, scheduling, and Apple’s release planning can all affect the eventual launch. Until Apple publishes a date, claims that season 4 will premiere in a particular month or year should be treated as speculation.

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What is confirmed about season 4?

  • Apple renewed Foundation for season 4 on September 11, 2025.
  • Apple said production was scheduled to begin in early 2026.
  • Ian Goldberg and David Kob were announced as co-showrunners and executive producers.
  • David S. Goyer remained listed among the executive producers in Apple’s renewal announcement.
  • No official season-four premiere date was included in the reviewed announcement.

Will the season 3 cast return for season 4?

Only limited season-four casting information has been officially identified in the available announcements. Apple’s renewal notice specifically listed returning season-three performers including Laura Birn, Cassian Bilton, Terrence Mann, and Rowena King.

That is not a complete season-four cast list. It is also not confirmation that every season-three performer or newcomer will return. Until Apple or the production releases further casting information, the status of other performers should be described as unconfirmed rather than assumed.

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How the Apple TV+ series relates to Isaac Asimov’s books

Apple describes Foundation as being based on Isaac Asimov’s award-winning novels. The television series uses Asimov’s ideas and literary foundation, but readers should not expect a scene-for-scene adaptation of the books. The show’s long time jumps, revised character histories, expanded political conflicts, and original story choices make it its own version of the material.

For viewers who want to explore the source material, Isaac Asimov’s original Foundation trilogy is the most direct place to start. Penguin Random House lists a physical Foundation 3-book boxed set containing the original trilogy, as well as individual print editions such as Foundation. The boxed set is the convenient choice for readers who want the complete original arc; buying the first novel individually is a lower-commitment option.

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The books are source material, not an official Apple TV+ season-three tie-in, screenplay, episode guide, or prop replica. Exact price, seller, stock, edition, and retailer availability should be checked before purchase.

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Should you watch season 3 before reading the books?

Either order works, depending on what you want from the experience. Watching first provides the show’s visual world and lets you approach Asimov’s novels as the influential ideas behind the adaptation. Reading first offers a clearer sense of the books’ original structure and makes the television series’ changes easier to identify.

Because the adaptation does not follow the novels one-to-one, reading the trilogy will not simply reveal every season-three plot point in advance. It is better understood as a way to compare two different versions of the same broad science-fiction foundation.

Spoiler note

This overview deliberately avoids major season-three deaths, the finale’s character outcomes, and detailed changes from Asimov’s novels. Those subjects require episode-specific sourcing and a clearly marked spoiler section. The confirmed information above is enough to establish the release status, premise, cast plans, and season-four outlook without revealing the completed season’s ending.

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At a glance

Question Answer
When did season 3 premiere? July 11, 2025
When did the season 3 finale arrive? September 12, 2025
How many episodes are in season 3? 10
Where can viewers watch it? Apple TV+, subject to regional availability and current access terms
Has season 4 been renewed? Yes, Apple announced the renewal on September 11, 2025
When will season 4 premiere? No official premiere date has been announced
When was production expected to begin? Early 2026, according to Apple’s renewal announcement

The Bottom Line

Foundation season 3 premiered on July 11, 2025, completed its 10-episode release on September 12, and is available on Apple TV+. Season 4 has been renewed, with production announced for early 2026, but Apple has not yet given it a premiere date or confirmed a complete returning cast.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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