It’s really not surprising that there has been a lot of buzz generated around Apple TV+’s upcoming Foundation Season 4. One look at Season 3’s explosive ending is all it takes to understand the buzz surrounding it. We’re talking about the Empire having its heart ripped out, allegiances flipping like a table, and the pure chaos of the Mule’s true identity revelation. Fans of the book series, written by Isaac Asimov, understandably had strong feelings. But love it or hate it, that cliffhanger had everyone screaming for more.
Thankfully, Apple TV+ gave the green light for another season even before Season 3 wrapped up; now, there are more details. According to the producers, cameras are set to start rolling in early 2026, with new showrunners calling the shots. While the studio is predictably tight-lipped on spoilers, the ending of Season 3 left viewers with more than enough breadcrumbs to get a feel of the show’s next direction. With that in mind, let’s dive into pertinent details like what to expect, who’s coming back, and just how long fans will have to wait for the new season.
‘Foundation’ Season 4 Will Pick Up From the Explosive Season 3 Finale
Right off the bat, we’ll stipulate that the Foundation Season 3 finale was a master class in destruction. This assertion is supported by one of its most pivotal moments, involving Brother Dusk (Terrence Mann), who transforms into Brother Darkness to annihilate the Cleonic clone dynasty. In what was equally a very distressful moment, fan favorite Demerzel (Laura Birn) became a victim of this genocidal act when she died trying, and failing, to protect the last baby clone. That’s right — the Empire has no North Star for the first time in centuries. The power vacuum is real, and fans are already drafting questions like: Could the lone surviving Cleon clone rise? Or is the dynasty truly done?
Over on the Foundation side, Gaal Dornick’s (Lou Llobell) face-off with the “Mule” (Pilou Asbæk) got turned upside down with Bayta Mallow’s (Synnøve Karlsen) ‘mic-drop’ reveal as the real Mule. The revelation split the fandom right down the middle, with some calling it genius and others unwaveringly deeming her actions a betrayal. Regardless, it sets up a wild new dynamic. What’s Bayta’s endgame? And how does Gaal bounce back after getting her allies wrecked?
And then there were the robots, who had been relatively quiet until now. However, the final moments of Season 3 teased something huge — mysterious signals, ancient tech waking up, and a not-so-subtle nod toward Earth. For Asimov heads, that’s a promise that Season 4 will not just continue the story, it’ll expand the universe. The robot agenda is officially on the main stage.
RELATED: ‘Foundation’ Season 3 Ending Explained: Does Gaal Defeat The Mule?
Who’s Returning To ‘Foundation’ Season 4 (and Who’s Not)
Given the relatively high death toll in the Season 3 finale, fans are understandably wondering which cast members will return to Foundation Season 4 and which ones will say their goodbyes. One cast member who is guaranteed to return is Lou Llobell. As the show’s emotional anchor, she will continue in her role as Gaal Dornick. Additionally, Jared Harris isn’t going anywhere and will continue to shape events as Hari Seldon, whether in flesh, memory, or digital form. Fans can also expect to see Cassian Bilton’s Brother Dawn, who was on Foundation during the season finale, to return. Another cast member highly likely to return is Synnøve Karlsen. This is largely because she was revealed as the Mule, and that reveal positions her as the upcoming season’s wild card. Furthermore, other familiar names, such as Terrence Mann, Alexander Siddig, Cherry Jones, and Cody Fern, are also likely to return.
However, let’s pour one out for the fallen. Laura Birn’s Demerzel had an all-timer exit that feels final. Nonetheless, this is Foundation, and fans should not discount the possibility that she will appear in flashbacks or as a ghost in the machine. Lee Pace’s Brother Day is also gone, and with the cloning tanks destroyed, a return would be a major reach. However, as Brother Dawn is still alive, there’s hope he will eventually grow in Day; let’s find comfort in that. Outside memory flashes, fans should also not hold out much hope of seeing Pilou Asbæk, who played the fake Mule vanquished by Gaal in the Season 3 finale. Still, this show loves a good twist. Between digital ghosts, new players from Earth, or straight-up resurrections, nobody’s ever truly gone. One thing’s for sure, the show’s Season 4 character game will be just as messy and brilliant as ever.
When Will ‘Foundation’ Season 4 Be Released?
Here’s the good news: renewal happened early, long before Season 3 ended. So fret not, fans, Apple TV+ is fully committed. The not-so-good (but not completely bad) news is that filming is scheduled to start in early 2026. It’s essential to note that past seasons took approximately two years from shoot to stream, indicating that late 2026, or likely early 2027, is the earliest fans could expect to see it.
What adds another wrinkle is that there’s also a new creative team in the mix. Ian Goldberg and David Kob are stepping in as co-showrunners in place of David S. Goyer, who gave up his post because of budget cuts. Regardless, he’s still on board as executive producer. However, that change could mean delays or, conversely, translate to an even faster pace for the show. Either way, fans should expect teasers and behind-the-scenes crumbs by late 2025 or early 2026. So, what are you most hyped for? The fate of the Empire now that Demerzel’s gone? Gaal’s comeback arc? Or the robots finally getting their moment?
Slide into the comments and let’s see whose predictions actually land. And if you’re not caught up? All three seasons are waiting on Apple TV+. You know what to do.
