Sci-fi drama “Silo” is one of Apple TV+’s most-watched series (it was the streaming service’s #1 drama debut when it premiered last year, per Nielsen), so it makes sense that it’s coming back for two more seasons.

Apple TV+ is renewing its sci-fi drama Silo for two more seasons — enough, it says, to bring the show to a conclusion. The series, based on a trilogy of novels by Hugh Howey, is midway through its second season on the streamer. The two-season pickup will allow the show to tell its complete story.

Apple has renewed Silo starring Rebecca Ferguson for two final seasons, as the show will adapt all three books in Hugh Howery's series.