Lauren Laverne interviews David Simon, creator of the acclaimed US cop show The Wire on why he breaks all the rules of television writing. Art critic Andrew Graham-Dixon risks a stiff neck in Rome to marvel at and decipher Michelangelo's vast fresco on the Sistine Chapel ceiling, which he commenced 500 years ago. It took four years to complete, and was dogged by battles with the artist's patron, Pope Julius II. Mark Kermode reviews the week's film releases including Puffball.