BBC2 Horizon on gravitational waves

There's an excellent documentary on the iplayer this week about the search for gravitational waves and how their discovery would provide evidence for the inflation model in Big Bang cosmology. It's a brilliant insight into how data is obtained and analysed. http://www.bbc.co.uk/iplayer/episode/b055knk1/horizon-20142015-9-aftershock-the-hunt-for-gravitational-waves