In this episode, we meet Ai Weiwei in Athens for his solo exhibition at the Cycladic Museum. We revisit his most iconic works and see how Ai Weiwei became the artist and the champion of human rights that he is today.

British sculptor Phyllida Barlow has been making art since the '60s but has only found public recognition in the last few years. Barlow, 73, is getting ready for the biggest show of her career after she was commissioned by the British Council to represent the UK at the Venice Biennale.