Food Unwrapped

Kate looks into Britain's plastic crisis, while Jimmy and Matt are braving the heat in South Africa on the trail of sweet piquanté peppers. They also discover `plant breeder's rights', which allow companies to own a fruit or vegetable.

Jimmy asks what makes a London dry gin a London dry gin, and finds out about a threat to British juniper berries that could spell the end of gin's recent resurgence. Kate checks out macadamias, and Matt finds out what is bad about double dipping.

Matt visits China to find out how they maximise the chances of finding pearls, and helps to cultivate them. Meanwhile, Kate has noticed a weird pattern on her ham, and after investigating discovers a bizarre connection between ham and butterflies.