Plot: Alan Yentob explores the magical and mysterious world of the best-selling children's author Roald Dahl to discover what made him such a great storyteller. This intimate portrait has exclusive access to his personal archive and features interviews with members of his immediate family, including his widow, Felicity, his first wife, the actress Patricia Neal, his children Tessa, Theo and Ophelia, and his granddaughter, the model Sophie Dahl