The choc-doc goes behind the scenes of Willy Wonka and the Chocolate Factory with actress Julie Dawn Cole (Veruca Salt) and also reveals writer Roald Dahl's inspiration for the book on which the movie was based. Plus, the story of the Mars bar, including how it got its name, and a glimpse inside the Lindt factory to find how Lindor balls are made and how an accidental discovery more than a century ago by Rodolphe Lindt himself changed the way chocolate tasted for ever.

Behind the scenes at the largest chocolate shop on the planet - the London branch of M&M's World, finding out how the store copes with its annual 5.5 million visitors. Plus, a look at a Belgian chocolate factory that churns out 1,000 tonnes every day, and the work of independent chocolatier and baker Rose Dummer, who has been commissioned to create a chocolate version of Stonyhurst College to celebrate its 425th birthday.