Episode 25:
I am a bit confused by the ending (or more like the previous episode still), but if it was authors intention to force people to make theories (including about alternate worlds), then maybe it's ok? I am not sure it adds much to the story when you create a doppelganger just for the sake of that, though. It could be any other random guy, really. But it's still a great show, that can make you think, question and even re-evaluate your own beliefs, same as that happened to people through-out the time.
