What is the story behind the most famous iconic photos from around the world? A unique and fascinating journey into the forbidden city of the contact sheets of the world renowned photographers from Magnum, the legendary agency founded in 1947. This series focuses on a different photographer each episode from the iconic agency Magnum and an iconic sequence of images shot on a particular assignment. This episode examines a photograph of Margaret Thatcher, 'The Iron Lady', who governed the UK for 11 years. The photo taken by Peter Marlow, during the Conservative Party Congress in 1981, will turn out to be the most representative portrait.