Ken Loach talks to Philip Dodd about his new documentary Spirit of '45, which celebrates the hopes of democratic socialism in post-war Britain. As the first UK retrospective of works by George Bellows opens, Night Waves sends the American poet Eva Salzman to take a look. Geoff Mulgan lays out his vision for a new breed of capitalism when he discusses his book The Locust and the Bee. And Keith Laws, Professor of Cognitive Neuropsychology discusses with Rupert Read, a philosopher of science whether psychologists should do more to act like scientists.