The Money Programme's Fiona Bruce gained exclusive access to Bill Gates as he prepared to step down from full-time involvement with Microsoft in June 2008. His audacious mission to put 'a computer on every desk and in every home' is now close to a description of modern life. In building his multi-billion dollar company, Gates made himself the richest man in the world, but he has also been dogged by controversy, as his ruthless leadership contributed 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 has amassed, through the charitable foundation he runs with his wife and his father. She examines the fortunes of Microsoft as it faces up to competition from internet-based companies. And the programme talks about Gates the man, the businessman and the philanthropist with a who's who of his friends, colleagues and rivals.

• Jeremy Clarkson