Episode 5

A look at the history of rivalry between different brands of chocolate biscuits and a behind the scenes visit to a Norfolk factory that produces 35,000 walnut whips every hour. Plus, a look at how chocolate became a much-needed taste of home for soldiers serving in the First World War, the story of the world's tallest chocolate fountain, and a chocolatier who was challenged to create a sculpture of an ancient Roman god for a festival.