In the last episode, David Dimbleby looks at how the 20th century saw ordinary Britons upturning ancient power structures and class hierarchies. The catalyst was the First World War, which embroiled the whole nation and called traditional values into question. The result was an ever-growing 'democratization' of culture, with art coming off gallery walls, becoming an instrument of self-expression at the service of the individual.Dimbleby looks at some of the great masterworks of modern British art (Paul Nash's 'Menin Road', Francis Bacon's 'Crucifixion'), but also champions lesser appreciated art forms like broadcasting and domestic design. Finally, he meets some of the personalities who are shaping modern British art today: Damien Hirst, Tracey Emin, Anish Kapoor and Gilbert and George.