Patti Smith, The Bridge's Sofia Helin, Men who kill their children

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Patti Smith talks about her new memoir M Train on the 40th anniversary of her hugely celebrated 1975 album, Horses. We hear from Claire Throssell whose two young sons aged 12 and 9 died as a result of a house-fire started deliberately by their father in which he died. Dr Elizabeth Yardley, director of the Centre for Applied Criminology at Birmingham City University, explains how rare these tragic cases are. Swedish actor Sofia Helin who plays Saga in the crime series The Bridge discusses her role and what to expect when it returns to our screens. British adventurer Sarah Outen has just completed her expedition London2London: Via the World - an attempt to row, cycle and kayak a continuous loop of the planet. She has covered over 25,000 miles, broken world records and unsurprisingly faced huge obstacles. Presenter: Jenni Murray Producer: Anne Peacock.