13 Minutes to the Moon: 5. The fourth astronaut

How a briefcase-sized computer, less powerful than a smartphone, pioneered space tech for the first Moon landing. Astronauts Neil Armstrong and Buzz Aldrin rely on the software to guide their spaceflight to the lunar surface. Developed by a pioneering team of programmers, including trailblazing scientist Margaret Hamilton, the Apollo Guidance Computer helps usher in the digital age.

Hosted by Kevin Fong.

Starring: Ramon Alonso Elaine Denniston Charlie Duke Don Eyles Eldon Hall Margaret Hamilton Dan Lickly

Theme music by Hans Zimmer for Bleeding Fingers Music

#13MinutestotheMoon www.bbcworldservice.com/13minutes