One man. One camera. Unlimited magic. From numerous Warner Bros films of the 1930s come 21 complete musical numbers that established forever the genius of choreographer Busby Berkeley. The segments are escapism, pure and simple, except they're never simple. Berkeley shoots through floors, through roofs and through one kaleidoscopic array of leggy chorines after another. The sequences can be heartfelt - the bustling ('42nd Street'), gaudy ('By Waterfall') or stunningly surprising ('Lullaby of Broadway'), yet all bear the imprint of unequalled filmmaking innovation.