The Amazon Prime series is set in an alternative world where the Allies lost World War II and the US has been split into the Greater Nazi Reich and the Japanese Pacific States.
In the first episode, a woman named Juliana is given a newsreel titled The Grasshopper Lies Heavy, which depicts different version of history in which the Nazis were defeated by the Allies.
She learns that the film is one of a series being collected by a mysterious figure known as The Man In The High Castle.
Season one ended with the shock reveal that ageing Nazi leader Adolf Hitler had been holed up in the Austrian Alps with a library of the film reels.
The Führer had become a man in a high castle, having locked himself away from the world due to his failing health, but season two reveals that he is not the man Juliana is searching for.
In the first episode of the new run it is revealed that the real collector is a man named Abendsen Hawthorne, whose castle is in fact a dingy caravan.
Season two reveals who is The Man In The High Castle
In the original Philip K Dick novel, The Grasshopper Lies Heavy is a book, and Abendsen is its author.
The Amazon series made the bold choice to introduce a series of dimension-hopping film-reels, which gives the show a sci-fi element.
Abendsen is supposed to be the fabled leader of the Resistance, but years of hiding has left him unhinged.
He explains that his metaphorical castle is built from “the conscious and unconscious mind” and reveals that he doesn’t make the films, but is collecting them to try to shape events away from nuclear devastation.
Stephen Root plays Abendsen
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Tagomi receives a box of films in the season 2 finale
The films, which appear to depict parallel realities, always show the same story of "fear and violence”, Abendsen explains.
Stephen Root, who plays Abendsen, has said that the audience will go on a “journey” with his character.
"Well, first of all, is he mad, is he a person of this timeline, is he a fake? I think that's the journey the audience is going to go on in season two and that's what's interesting” he told io9.
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Midway through the series, Abendsen torches the High Castle, taking only a few film canisters.
The season two finale ends with Resistance agent Lem giving Tagomi a box of Abendsen’s films, leading some fans to believe that the Trade Minister could become the new Man In The High Castle after his glimpses of the other world.