Silo season 3 ended last night with a blockbuster finale, the culmination of 10 episodes that started slow but became explosive, no pun intended, in the last two weeks. In this age of streaming, fans may now mourn that it could be anywhere from 1.5 to 3 years until Silo returns for season 4, waiting eons for a release date, but that is not going to be the case. Not even close.

Apple has confirmed that Silo season 4 will be out in the summer 2027. Best case, that’s 11 months from when season 3 started and around 9 months from now if it’s June. Worst case, it’s 13 months from season 3 and 11 months from now if it’s August. If it’s July? It will be exactly a year between seasons, and just 10 months to wait from here.

This was not the case for other seasons of Silo . The gap between seasons 1 and 2 was almost 17 months; the gap between seasons 2 and 3 was almost 18 months. Now, we’re looking at a year or less. How did they do it?

This is the benefit of Apple TV, which tends to do things like this more than other services. Silo seasons 3 and 4 were greenlit at the same time, before season 2 was even complete. That would finish the adaptation of the book series, and then they shot seasons 3 and 4 back-to-back, allowing for this quick release. It is even more impressive in this case, however, given that Silo seasons are 10 hour-long episodes while other shows may do this with 6-8 episodes, and sometimes episodes half that long. Like Slow Horses , Apple really got a handle on this scheduling, and now it’s going to have a complete package of one of the best sci-fi shows of the modern era by the end of next summer.

What’s coming in Silo season 4? Well, because it’s already filmed, Apple was able to air a minute-long trailer at the end of the finale. You can watch that if you want, but I purposefully did not, as I’d rather it all just be a surprise, and I don’t want to be anticipating situations all season long that the trailer hint at. But it’s up to you.

In terms of last night’s finale, spoilers follow here. Troy , the name of the episode, ended up being a new moniker for Daniel, the “modern day” protagonist we followed throughout the season. Through the magic of cryo, and I believe the overestimation that the Silos have been active for hundreds of years rather than decades, the two sets of characters now exist at the same time and are now trying to kill each other, with Juliette attempting to invade Silo 1. There is also a heavy, heavy implication that Juliette is Daniel’s daughter with Helen, or at least a descendant, as the timelines are still a bit fuzzy. Daniel may be slipping out of his brainwashed Troy persona once he’s told Helen’s name, which is a great kickstart to next season, and it’s only 10 months away (probably).

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Pick up my sci-fi novels the Herokiller series and The Earthborn Trilogy .