Night Waves - Tom Murphy/The Kreutzer Sonata/Godfrey Barker

Matthew Sweet with the arts and ideas programme. Tonight, he meets the veteran Irish playwright Tom Murphy, whose influential work in the 1960s and 1970s provoked controversy, and reviews the new film of Tolstoy's novel The Kreutzer Sonata. He also talks to the art market analyst Godfrey Barker about the opening of the world's biggest art fair in Maastricht and what art prices have to do with the aesthetic value of the art.