What is the best season of For All Mankind?

Season 1 (1969)

The alternate-history debut where the Soviets land on the moon first, forcing NASA into a new space race — a slow-burn but deeply compelling foundation for the series.

Season 4 (2003)

Set on a multinational asteroid-mining base, Season 4 expands the world further with bold political themes and one of the most shocking mid-season twists in the show's run.