When We Left Earth: The NASA Missions (2008) (tv show): Narrated by award-winning actor Gary Sinise, WHEN WE LEFT EARTH is the incredible story of humankind's greatest adventure, as it happened, told by the people who were there. From the early quest of the Mercury program to put a man... Discover the latest Discussions, Reviews, Quotes, Theories, Explanations and Analysis of When We Left Earth: The NASA Missions (2008) below