Silo has quietly remained one of the greatest sci-fi series on Apple TV. The series, based on Hugh Howey’s self-published sci-fi novel, has so far covered the adventures of Juliette Nichols (Rebecca Ferguson), the now-mayor of Silo 18, as she tries to figure out just what happened to the world to necessitate underground bunkers in the first place and who is controlling them from afar.
The audience had these questions answered in a flashback storyline throughout Season 3, following journalist Helen Drew (Jessica Henwick) and Congressman Daniel Keene (Ashley Zukerman) as they investigated a secret project of a trillionaire. After a shocking finale, there’s only one season left to break down the many, many mysteries surrounding the Silos — but the end is in sight. Here’s everything you need to know about Silo Season 4, from when you can watch it to how it all could end.
