MI6: A Century in the Shadows - New Enemies

BBC security correspondent Gordon Corera looks inside Britain's Secret Intelligence Service. He talks to senior intelligence officers, agents and diplomats as well as their former arch enemies about the shadowy world of espionage. Exploring the role of MI6 in the 21st century. The head of Britain's Secret Intelligence Service, John Scarlett, talks for the first time about the interrogation of terrorist suspects and MI6's role in the run-up to the war in Iraq.