I finished watching it last night.
SPOILERS!
What do you think the alternate-history newsreels mean? My guess is the writers are hinting at some form of multiverse as a result of the atom bombs. As I see it, they've implied at least three different/parallel universes: one in which the Nazis and Japan won WWII, one in which they lost (as shown in certain newsreels), and one in which a war happens again (as shown in the last two episodes in which the main characters are portrayed in that execution newsreel scene).
And does the Japanese Trade Minister have some kind of ability to move from one universe to another, as shown at the very end of Episode 10?
They have a lot of explaining to do, to say the least.
Also, ultimately what was the point of showing the Japanese couple who were suckered into buying fake antiques? In the end, that storyline didn't really go anywhere.
I'm curious what the writers will do next year. Hopefully it will involve additional characters traveling between alternate realities, messing things up, having to put more right, etc. As Kieran mentioned, the guy who created the series was one of the producers of the X-Files, so this could go anywhere.