The history of mankind is a never-ending story of change, revolution, evolution - but surely no span of a hundred years can claim to have changed the world so dramatically, so rapidly and so irreversibly as the 20th century. A century where the empires of the past crumbled to make way for new superpowers and a new age. Built on science, exploration, and a desire to express new creative possibilities. A century where the world was drawn into one war after another. But where radio, film, television, cars, planes and finally computers drew us closer together than at any other point in history. It was a century of unprecedented change. Change that was born out of the actions of individuals - what they created, what they discovered, what they destroyed. Who were the 101 people who drove the changes in every aspect of life that made the 20th century and set-up the 21st? A decade and a half since the close of the century we can take a considered look at the people most responsible for the events that changed their world and made ours. In this series we count down - from 101 to No.1 - the names of those who, in the judgement of experts, including those who contribute to the series, most influentially shaped the century and our world. If this episode teaches us anything it's that revolutionaries come in many different forms. All 13 of our subjects have been pioneers and leaders in their fields and have changed everything, from the way we watch films to how we connect and work. For some the word revolutionary might only be a title but for others, such as Castro and Ghandi, it is far more real. This episode of heroes and villains features some of the most famous and infamous faces of the twentieth century.