When Neil Armstrong made one giant leap for mankind in July 1969, America made claim to the title of winner of the space race. But the real space pioneers of the 20th century were the Soviets. Between 1961 and 1966, they realized a number of spectacular achievements, including the first man and woman in space, the first spacewalk and the first unmanned lunar landing. Up to that point, the Soviets seemed unstoppable. Then a string of misfortunes struck, allowing the Americans to streak ahead. In the aftermath of this defeat, the Soviets recalibrated their space program in the 1970s, achieving even more success and coming to dominate modern space exploration in many ways. This series uses archival footage and compelling interviews to reveal the story of the space race from the other side of the Iron Curtain.