“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. #13MinutestotheMoonFor a film about how the crew made the makeshift CO2 adaptors: www.bbcworldservice.com/13minutesPresented by Kevin Fong.Archive: NasaStarring:Jim LovellMerlin MerrittAnthony EnglandEd Smylie, courtesy of the Johnson Space Center Oral History Project Fred HaiseMarilyn LovellKen MattinglyCharles A BerryJoe Kerwin Gerry GriffinWritten 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