In this episode, David Dimbleby explores the images that have helped define England - thatched cottages, rolling Downs and hidden villages along the coast of Hampshire, Sussex and Kent. This has also been the place of threatened invasion. David sails Rocket, his own boat, through the treacherous waters of the Solent that inspired JMW Turner's seascapes; explores the hills immortalized by William Blake in Jerusalem; and discovers the terrible beauty of paintings by Paul Nash, the World War Two artist. David's journey comes to an end on the white cliffs of Dover where Dame Vera Lynn movingly sings her wartime classic of the same name.