I thought there were some amazing things happening in this episode leading up to the end. I'm still taking in the very end. It's actually something I had thought about being a possibility, but thought to myself "that's surely not what it will end up being." Since I had kind of already dismissed that possibility of what the FST is, it's a little weird thinking about it being the real ending.
Still, some of my favorite moments from the entire show happened tonight. Jack's line "it's a surprise" was one of my favorite moments, along with quite a few others. I really think the ending was fitting, and I think after a few days of thinking about it, it will all feel very right, but it will take a few days to ponder and take it all in.