I wouldn't call it incredible, because alternate history done right requires getting so close, right in the "uncanny valley", that it's all disturbingly familiar. And disturbingly different. Man in the High Castle achieved that as a production. I was dazzled to the very end by the world they created.

I read the book long, long ago, so my memory's hazy; but I think they pretty much covered it in ten episodes. What is probably a stroke of genius is adding the Resistance to Dick's story, because it provides a vehicle for some of the characters to continue the story into a second season.

It's 1962 in that world in season one. It feels like there's a huge amount of space in which to keep telling the story of how that world develops going forward. The biggest, largest-scale theme going forward is the growing tension between Japan and Germany, and damn, that's something you could really have fun with.

The Trade Minister's final scene was nicely ambiguous. He was meditating and then suddenly found himself in what sure looked like our universe. What did it mean? Was he really transported across universes, did he die, or was it all just a dream, Dorothy? Stay tuned for season two.

Overall the first season's ten episodes were excellent, I thought. I'd give it five stars, and I'd keep watching if they keep making it. Loved it.