The Man in the High Castle (TV series)
Adaptation of Philip K. Dick's alternate-history novel where the Germans and Japanese win the Second World War, and North America is partitioned between the Japanese Pacific States and the American Reich, with the Rocky Mountains serving as a buffer between the territories. In the show's case, The Grasshopper Lies Heavy is a series of films that shows the Allies winning WW2, with the eponymous character being responsible for it, and the series overall creates a good atmosphere. It somewhat jumps the shark at the end of the third and the fourth and final season with the exploration of alternate realities, and while I somewhat prefer the book, I definitely don't regret watching it.