Art21 is an award-winning series of 24 programmes in which more than 90 contemporary artists talk about their creations, the way they work and their individual view of art. How might desires and taboos shape our ability to imagine? What role does technology play in wish fulfilment? The episode “Fantasy” explores these questions in the work of the American artist Jeff Koons, German photographer Florian Maier-Aichen, the American painter Mary Heilmann and young Chinese media artist Cao Fei.