This episode made my brain weird. Not just having the "wow" moment but I felt my brain had a spongebob like "wow" text on it. This, Silo Team, has a unique way of telling stories and giving directions to the story. Timeline, faces, emotion changes, people being x then being y - no spoilers. They do it in such way you cannot say you weren't waiting for that, but definitely cannot say "I knew it". Rebecca Ferguson is the only possible right person for her role, with every aspect of it you can feel when she knows, hates, figures out and she means it as if she is actually there. Tim Robbins' performance overall great, but this episode, remarkable. He gave us his career character, in such hard moments considering that wasn't his usual role. Not to keep it as long as a book, whole cast had their prime performances for a great finale. Thanks for new questions to be answered next season. Please make new seasons faster.