When We Left The Earth - Episode 5.

The fifth episode focuses on the flights of the Space Shuttle, beginning with Columbia's maiden voyage on April 12, 1981 (the twentieth anniversary of the first human spaceflight, Vostok 1). The STS-1 crew, commander John Young, and pilot Bob Crippen, are interviewed. Bruce McCandless's untethered spacewalk on STS-41-B - the first in history - is shown digitally remastered in high-definition. The episode also documents the Space Shuttle Challenger disaster that occurred 73 seconds after lift-off on mission STS-51-L, on January 28, 1986, and the subsequent halt of the Space Shuttle program. The episode ends with the launch of the Hubble Space Telescope in 1990 on mission STS-31 and the subsequent discovery of its defective mirror.