Summary: This week Libby Purves is joined by Runa Khan Marre is winner of a Rolex Award for Enterprise, for preserving the unique cultural heritage of Bangladeshi boat-building; conductor Charles Hazlewood has created an orchestra from scrap for a BBC Four documentary, 'Scrapheap Orchestra'; chroeographer Matthew Bourne's ballet company New Adventures' returns to Sadler's Wells this Christmas with their much loved production of Tchaikovsky's Nutcracker!; and Gebisa Ejeta is one of the world's leading scientists who has been developing drought-resistant crops for Africa and is in conversation for the BBC World Service's 'Exchanges at the Frontier' at the Wellcome Collection.
