Dramatist Tom Stoppard on why he has adapted a famous rock album for radio; novelist Charlaine Harris on getting it in the neck from readers for ending her True Blood vampire series; Vince Gilligan, creator of Breaking Bad and comedians Jonny Sweet and Simon Bird talk about their new World War I sit-com. Novelist Nadifa Mohamed explores in fiction the Somalian childhood she never had and John Wilson meets producer-musician Naughty Bo and closes down the Cultural Exchange with Armando Iannucci.