Rana Mitter discusses two new shows of the painter, Frank Auerbach's work with the critic, Bill Feaver and explores the vexed terrain of surveillance with the philosopher, Zygmunt Bauman and the journalist, Nick Cohen. There's also a review of a DVD release of Die Nibelungen, one of Fritz Lang's great films and the playwright Christopher Hampton talks about his new play, Appomattox and shares his enthusiasm for a neglected masterpiece of European literature, Odon von Horvath's The Age of the Fish.