Billion Colour

This series uses modern coloration techniques to present a history of America in color. Season 2 takes viewers on another visually stunning journey, shifting the focus from various decades to iconic thematic episodes in history. To make this series, filmmakers spent 6000 hours painstakingly scouring obscure archives, dusting off forgotten family vaults, and tracking down dedicated private collectors to find the 27 miles of film they needed – much of it not seen for nearly a century. The result is a feast for the eyes, and brings fresh excitement to seminal images of our time.

Chocolates are an essential part of many people's festive celebrations. In this Christmas special, Gregg Wallace visits a factory which produces a staggering two million tins of festive chocolate assortments a year. At materials intake he receives 20 tonnes of liquid chocolate at 50 degrees Celsius. This is used in 10 of the 12 sweets in the tin. Everyone has their favourite (for Gregg it's the purple-wrapped caramel-coated hazelnut) and he follows the supersized batches of the toffee, orange and strawberry varieties on their journey from tanker to tin. In just one hour 800 kilos of toffee is cut into precise 10mm x 55mm sticks before they disappear under a chocolate waterfall.

BBC version presented by Michaela Strachan, Chris Packham and Gillian Burke.
PBS version presented by Samantha Brown, Chris Packham and Bob Poole.