Channel 4's CEO Alex Mahon says the allegations made against Russell Brand are "disgusting and saddening," but what do the claims mean for the TV industry as a whole? And when reporting the testimony of anonymous witnesses, how hard is it to get a story like this over the line? Ros Atkins talks to the Channel 4 executive behind the Russell Brand story about their collaboration with the Times and the Sunday Times and we get the government's view on regulation of internet TV channels and social media.Guests: Lucy Frazer, Secretary of State, Department for Culture, Media and Sport; Louisa Compton, Head of News and Current Affairs and Specialist Factual, Channel 4; Mark Williams-Thomas, investigative journalist; Chris Curtis, Editor in Chief, Broadcast; Alexandra Topping, Senior News Reporter, The Guardian; Peter Guest, Acting Business Editor, Wired.Producer: Simon Richardson