This one is a real treat for music fans of a Friday night so, if you can wrangle the remote away from the Toy Show lovers, head on over to BBC Four for the first in a two part documentary about the early years of blues music. It takes a closer look at the genre, which began as a form of black pop, to discover how Bessie Smith, Blind Lemon Jefferson and Charlie Patton used the latest media to bring their sound to the public. Keith Richards, Taj Mahal and Chuck D are among those making contributions.