https://www.youtube.com/watch?v=BLBvbMtjyAQ The mystery deepens in the third season of sci-fi thriller Silo To expect easy answers from Silo is to not know the post-apocalyptic drama. In its third and second-to-last season, the mystery of why tens of thousands of people live in bunkers extending 144 levels below ground remains unsolved. But as we get closer…