Alastair Sooke travels to Spain, France and America to explore the influence of Pablo Picasso on art and design. He considers how Picasso's fascination with women and bullfighting influenced his work, as well as exploring the many periods of experimentation the Spanish artist went through in his career. Alastair also talks to Picasso's biographer John Richardson, and artist Lydia Corbett, who under her former name Sylvette David, provided the inspiration for his Girl with a Ponytail series of pictures.