it's all still on iplayer if not: http://www.bbc.co.uk/iplayer/episode/b01b4x9g/How_the_Brits_Rocked_America_Go_West_How_the_West_Was_Won/

it was quite good, but also massively contrived and overreaching in trying to argue how important British music really is. I had a thinly veiled rant on tumblr about it: http://heff88.tumblr.com/post/17561537131/how-the-brits-rocked-america-go-west-contrived