When the crew of Apollo 11 returned to earth after their historic mission to the Moon, they were immediately placed in quarantine for 3 weeks. It was done to protect the Earth from the dangers of possible lunar alien life. Dr William Carpentier was the flight surgeon for the Apollo 11 mission and was placed in quarantine with the crew to monitor their health and check for any signs of alien life. He talks to Alex Last about his memories of working with the Apollo programme and life in quarantine.

Photo: Apollo 11 astronauts (left to right): Neil Armstrong, Michael Collins and Buzz Aldrin peer from window of the Mobile Quarantine Facility aboard the U.S.S. Hornet after their July 24th recovery.