Bill Gates: How a Geek Changed the WorldThe Money Programme's Fiona Bruce gains exclusive access to Bill Gates as he prepares to step down from full-time involvement with Microsoft, the company he helped found.

Gates's company has changed the world, but he's a controversial figure, with his ruthless business leadership contributing to Microsoft being sued by the US government.

In a special one-hour edition of the Money Programme, Fiona Bruce presents the definitive profile of Bill Gates as he embarks on his latest challenge: giving away the billions he's amassed.

She examines the fortunes of Microsoft as it faces up to competition from Internet-based companies, and the programme asks an array of well-known friends, colleagues and rivals what the future holds for the company in a post-Gates world.

Watch the full documentary now -