With Kirsty Lang. Tracey Emin discusses how she feels about returning to her home town of Margate with an exhibition including new works conceived specially for Margate and exploring themes of love, sex and eroticism. In January 1937 in Peking the body of a teenage British girl was discovered, with her heart removed. She was the daughter of an ex-British consul and the crime, which shook both the Chinese and western community, was never solved. Writer and historian Paul French explains why he became obsessed by the story and how, 75 years on, he has come up with a solution to the mystery. Jason Solomons brings news from the Cannes Film Festival, as the jury prepares to announce the winners of the main prizes. Music and speech played an important role in the 1960s Black Power movement in America. Writer Pat Thomas has spent years tracking down rare recordings, which include spoken word discs from Motown's Black Power imprint. Music writer Kevin LeGendre joins Pat to consider how musicians and performers responded to political change. Producer Philippa Ritchie.