Surgeon Henry Marsh and critic Susannah Clapp review the opening of Tom Stoppard's 'The Hard Problem' at the National Theatre tonight.
Matthew Sweet is also joined by musician and neuroscientist Daniel Levitin to discuss his new book - 'The Organized Mind: Thinking Straight in the Age of Information Overload. And New Generation Thinker Alasdair Cochrane and Anne Phillips, author of a forthcoming book 'The Politics of the Human', discuss what comprises humanness.