Cameras follow the launch of the new confectionery department at Fortnum & Mason after a major refit. Plus, the history of Christmas chocolate packaging, and a behind-the-scenes look at the making of advent calendars stuffed with chocolate treats.

A look behind the scenes at York's Kit Kat factory, which helps satisfy Brits' cravings for a billion of the chocolate fingers every year. Cameras also follow Gabriella, the UK Junior Champion Chocolatier, who at 23 was commissioned to make a chocolate sculpture for a VIP event.

A visit to the home of Toblerone in Switzerland, following the nougat-making process and discovering where the chocolate-maker's triangle obsession came from. Back in Blighty, chocolatier extraordinaire Paul is on a mission. He wants to create a show-stopping chocolate sculpture depicting a barman pouring an everlasting bottle of rum to launch a new range of rum truffles - but the path to chocolate happiness doesn't always run smooth.

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.

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.

The first episode goes behind the doors of the Cadbury factory in the village of Bournville, near Birmingham, and meets builder John, who relives his experience of playing the Milky Bar Kid in the famous chocolate adverts of the 1970s. Goth artist Annabel creates a chocolate angel of death for an undertakers' party at a mortuary and there is a trip to Harrods to see the To'ak - at ú400 the world's most expensive chocolate bar.