George Alagiah explores the fascinating history of Queen Elizabeth II and the Commonwealth. He discovers how the role of heading this family of nations has affected the Queen as she grew and developed, both as a monarch and as a person. His journey starts in Tonga, one of the furthest-flung stops on the Queen's first Commonwealth tour in 1953. From there, George's Commonwealth tour takes him to Australia, Ghana, India and South Africa. In each country he discovers how the shy young Queen grew into a monarch who commands respect, exploring moments of triumph, diplomacy, challenge and political intrigue. Gathering testimony from people who have met the Queen across the years and from experts who have followed her journey, George builds a picture of how deftly the Queen has played her role as head of the Commonwealth. Her daughter Princess Anne also talks about the Queen's role as a woman in a male-dominated world.