Web inventor warns on surveillance and censorship

The founder of the world world web, Tim Berners-Lee, says that the democratic potential of the internet is being undermined by surveillance and censorship by nation states. We hear how a third of all countries block or filter political content - and Tim Berners-Lee tells us how he supports Edward Snowden's whistleblowing. Also an inquest in London hears how an intern died after working gruelling hours at investment bank Merrill Lynch. And it's the 50th anniversary of BBC science fiction hit Dr Who - we hear how the franchise has captivated fans worldwide.