Gustav Wagner, the 'Angel of Death' who ran the Nazi extermination camp at Sobibor, talks for the first time about the gassing of a quarter of a million people, about torture and how the Vatican helped him escape from Europe to South America. Wagner insists that he was 'just obeying orders.' While 'Nazi-hunter' Simon Wiesenthal claims 'No one ordered the SS officers to be brutal.'

Panorama has investigated Wagner's wartime career and talks to German politicians about this week's important debate in Bonn on whether or not to end prosecutions of Nazi criminals.