To mark Hollywood's 100th anniversary, Paul Merton travels to America in a series that explores how the early pioneers there laid down the blueprint for today's cinema industry. In the first episode, Hollywood is still a sleepy California backwater of orange groves about to be transformed by film-makers from the East Coast in search of sunny locations and wide open spaces. The film concentrates on the career of DW Griffith, one of Hollywood's most influential and controversial directors during this explosive early period. Griffith was also instrumental in establishing the star system after co-founding the United Artists film studio in 1919 with Charlie Chaplin, Mary Pickford and Douglas Fairbanks.