S6E0: Christmas Cards | Inside the Factory
Gregg visits the Woodmansterne card factory in in Watford. It's one of the largest greeting card companies in the UK, a family business sending out 35 million cards a year.
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Steve Backshall visits unexplored parts of the world. This time his team is kayaking in the Arctic - they face perilous sea ice and have a terrifying encounter with a polar bear.