In the last of this fascinating series, presenter and art historian Sandrine Voillet takes a look beyond the glittering surface of Paris at the underground worlds and movements that defined the city in the 20th Century. She meets the can-can girls at the Moulin Rouge and drinks absinthe at Pablo Picasso's favourite haunt. She also meets up with Olivier Picasso who tries to explain just what his grandfather's wives made of the way he painted them. Post-Liberation Paris saw a revival of the Quartier Latin – the medieval heart of the university – and Sandrine discusses Existentialism with students, makes a nouvelle vague film, talks pop music with Jane Birkin, and visits the setting of the May '68 Revolution.