NASA's Greatest Missions S01 E04 The Explorers

NASA made scientific research a primary objective for the flight of Apollo 13. But halfway to the Moon the astronauts were put to the ultimate test when their oxygen tanks exploded. All of a sudden the key objective of the mission had changed radically to one of pure survival. Without the skill and professionalism of both the crew and the engineers back at mission control these men would never have lived to tell the tale.