Great review! I'm still processing, and am most intrigued by why Amara couldn't suck out Dean's soul (it seemed like she was a little surprised when that happened?) Maybe he's not human any more?

It seemed to me that Sam was there physically, the way he was in "Taxi Driver," and the way Lucifer talked it sounds like he'll be possessing Sam pretty soon (which will be hella fun for Jared!) I'm guessing since Sam already said yes once, he can't exactly take it back. Once a vessel, always a vessel, right?

Which still leaves the question of how Sam (or Lucifer!Sam) will get out of the cage (as I'm pretty sure he will!)