“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