Movies in the Roaring Twenties: Hollywood became a glittering entertainment industry with star directors like Charlie Chaplin and Buster Keaton. But the gloss and fantasy was challenged by movie makers like Robert Flaherty, Eric Von Stroheim and Carl Theodor Dreyer, who wanted films to be more serious and mature. This was a battle for the soul of cinema. The result: some of the greatest movies ever made.

The coming of sound in the 1930s upends everything. We watch the birth of new types of film: screwball comedies, gangster pictures, horror films, westerns and musicals, and discover a master of most of them, Howard Hawks. Alfred Hitchcock hits his stride and French directors become masters of mood.

Mark Cousins explores how the trauma of war led to more daring creations for cinema, focusing on the darkening of American film and the drama of the McCarthy years. Screenwriters Paul Schrader and Robert Towne discuss the era and Stanley Donen - director of Singin' in the Rain - talks about his career.