'For All Mankind' has captivated audiences with its exploration of an alternate history where the Soviet Union landed on the moon first in 1969. As the series prepares for its sixth and final season in 2027, fans can seek out similar shows that delve into alternate histories and realities. Notable mentions include 'Timeless', which follows a team of historians and soldiers as they chase a villain altering history. 'The Man in the High Castle' presents a chilling vision of a world dominated by fascism after a Nazi victory in World War II, while 'Counterpart' features J.K. Simmons navigating espionage between two parallel Earths. Other recommendations include '11.22.63', where a teacher attempts to prevent JFK's assassination through time travel, and 'Fringe', which explores bizarre scientific phenomena and alternate timelines. Each of these series offers unique storytelling that challenges viewers to consider how different choices could have reshaped our world.