Catch up TV
Series 15 Episode 5
What in nature provides the natural bright blue dye in our sweets? Why is there jelly in our pork pies and how does it get there? And why is soft shell crab such a delicacy?
Source: Channel 4
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Favourite investigations. Kate Quilton visits McVitie's to ask why many biscuits have little holes all over them. Jimmy Doherty finds out how corks are made for wine bottles.
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Channel 4
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Kate and Helen explore vanilla, while in the Netherlands Matt explores the myth that Edam balls were once used as emergency cannon balls!
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