You can actually now download it yourself from the BBC iPlayer, for the next few days, at the following link:
http://www.bbc.co.uk/programmes/b00n93c4Even though it was very good, i think they may have crammed a few too bands in and missed out on a few details. Next week it's a Kraftwerk and Krautrock special, which will probably go a lot more in depth on fewer bands.
The best ones though have been the documentaries made about smaller music labels: Stiff, Rough Trade, and Factory, the latter being absolutely top-notch, made just before Tony Wilson passed away.