This week marks the fiftieth anniversary of the Apollo 11 landing on the Moon. It is estimated that 600 million people, or one in five on Earth at the time, were watching live on television, although we may never really know. Earlier this year I was fortunate to present a conference session with James Burke, who commented on the lunar landing for the BBC. Incredibly, little remains of that live coverage, but an abundance of archive programmes celebrates one of the most significant television events ever.