Every revolution begins with a single act of defiance.
Why it is hard sci-fi
An alternate-history series in which the Axis powers won the Second World War and the United States has been partitioned between the Greater Nazi Reich and the Japanese Pacific States. The show is rigorous about the political and economic operation of the partition, including a working Pacific States cultural inversion that treats American antiques as exotic. The shows speculative element is a set of films that show different histories, which the show eventually reveals as recordings from neighbouring branches.
Science inside it
Many-worlds branching with a localised crossing point as the shows speculative claim, post-war alternate technological pathways including Nazi rocketry as a working high-altitude transit between the Reich and the Pacific States, and the procedural shape of a totalitarian state managing two alternative histories simultaneously.