Spoilers ahead for Amazon's The Man in the High Castle. Season 4 of The Man in the High Castle arrived on Amazon's streaming service this past Friday, bringing the adaptation of Philip K. Dick's acclaimed alt-history novel to a close. But with 40 hour-long episodes, the creative team behind the scenes (led by series creator Frank Spotnitz) had to fill out the story beyond what the 240-page novel covered. With such adaptations come the expected good and the bad; The Man in the High Castle has been, overwhelmingly, on the good side of things, …