“We were being poisoned by our own exhalation.” Carbon dioxide threatens to kill the crew. Mission control must improvise as the most fragile system of all is under threat: the astronauts themselves. #13MinutestotheMoon

For a film about how the crew made the makeshift CO2 adaptors: www.bbcworldservice.com/13minutes

Presented by Kevin Fong.

Archive: Nasa

Starring:

Jim Lovell

Merlin Merritt

Anthony England

Ed Smylie, courtesy of the Johnson Space Center Oral History Project

Fred Haise

Marilyn Lovell

Ken Mattingly

Charles A Berry

Joe Kerwin

Gerry Griffin

Written by Kevin Fong and Chris Browning

Theme music by Hans Zimmer and Christian Lundberg for Bleeding Fingers Music

BBC Radio Science Unit for the BBC World Service

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