Based on the novel from Philip K. Dick, the author behind several stories that were adapted into beloved sci-fi classics, like Total Recall, The Man in the High Castle centers around an alternate history in which the United States was defeated by both Japan and during World War II. America has been split into three parts - the Greater Nazi Reich, the Japanese Pacific States, and the Neutral Zone - and a new war is stirring, not only pitting resistance fighters against the Axis powers, but the Axis powers against each other as well. And, to satisfy Dick's affinity for science fiction, characters discover, one by one, that there is a multiverse in which alternate versions of the war's history are being discovered.

Related: Man In The High Castle Season 3 Trailer Declares All-Out War

The first three seasons of The Man in the High Castle follow the tumultuous climb (and fall) towards answers, victories, and resolution (whatever that may even mean, considering the blurred lines between good and bad are growing exponentially blurrier as the series progresses), and The Man in the High Castle season 4 will expand on some intriguing questions and properly conclude the series, as Amazon confirmed The Man in the High Castle season 4 is the final season. Here's what fans can expect.

Last updated: February 19, 2019

When Will The Man in the High Castle Season 4 Release?

At the moment, there is no official release date for The Man in the High Castle season 4. That said, The Man in the High Castle season 4 is supposed to release in fall 2019, which falls in line with the last two seasons. The first three seasons have all been released around early and late fall (season 1 was released in November, season 2 was released in December, and season 3 was just released in October), so it makes sense that Amazon would be planning to release The Man in the High Castle season 4 in the same time frame.

Who Will the Cast of The Man in the High Castle Season 4?

Along with the show's recurring characters, The Man in the High Castle season 4 will introduce some new additions to the cast. s Turner (Waco) will play Captain Iijima, who works closely with Inspector Kido.

What We Know About Man In The High Castle Season 4's Story

The Man in the High Castle season 4 synopsis promises a full-fledged rebellion against the Axis powers, which will be "driven by Juliana's visions of a better world." This will ultimately result in "a new Black insurgent movement [emerging] to fight the forces of Nazism and imperialism." Even though Juliana left the universe in The Man in the High Castle season 3 finale, she will eventually reunite with the people she left behind, as shown in the above season 4 teaser trailer.

Meanwhile, John Smith's wife, Helen, has abandoned him (and he's fairly certain that he can get his son Thomas back, though not the version from his own dimension), so he will continue pushing the development of the Nazi's portal, so that not only can he explore a new dimension but also possibly find a different version of his son; this would resemble the season 2 story arc for Tagomi.

Then, of course, there is the entirely new subplot concerning new characters like Bell Mallory, who specifically will deal with the Black insurgency mentioned in the synopsis. And, given that there isn't just one version of every character in this show, death doesn't necessarily spell permanent doom for any given actor. The deeper this series dives into other universes, the more possible it is to see previously deceased characters making a return. Regardless of what happens, The Man in the High Castle season 4 is going to go out with a bang.

More: The Man In The High Castle Season 3 Review: More Sci-Fi Action Refocuses The Series

Season 3 of The Man in the High Castle is currently available on Prime Video.