Front Row - I am Kloot and Andrew Graham-Dixon on Caravaggio

Kirsty Lang talks to Andrew Graham-Dixon about his ten year detective hunt for new evidence about the life of painter Michelangelo Merisi di Caravaggio. Red is the colour. This year's Serpentine Pavilion has been created by the French architect, Jean Nouvel. The entire design is rendered in vivid red - to play on the contrast with the surrounding green park. The shade of red calls to mind the colour of post-boxes and phone-kiosks and London buses. Architecture critic Hugh Pearman, Julian Stray assistant curator of the British Postal Museum and Archive, and Joe Kerr of the Royal College of Art - who is also a bus driver - consider the social, historic and emotional connections between London and the colour red. The Times film critic Kate Muir reviews White Material, the latest film by Claire Denis. It stars Isabelle Huppert as the owner of a coffee plantation in Africa, struggling to get in the harvest whilst the country is in the grip of a violent revolution. John Bramwell, lead singer of I Am Kloot talks about being labelled Manchester's best kept secret. Their fifth album - Sky At Night - is produced by Elbow's Guy Garvey and Craig Potter. Producer Robyn Read.