Art writer Waldemar Januszczak explores the revolutionary achievements of the Impressionists. In the first episode, Waldemar delves into the back stories of four of the most influential Impressionists - Pissarro, Monet, Renoir and Bazille - who together laid the foundations of the artistic movement. He finds out what social and cultural influences drove them to their style of painting, how they were united and how ultimately they challenged and changed art forever.