In this special episode Jimmy Doherty, Matt Tebbutt and Kate Quilton test some of the food techniques they've discovered during the series, to answer viewers' questions. Jimmy discovers how caffeine is extracted from coffee beans and asks if we should be worried about caffeine in the first place, examining how much it takes to harm you. Kate investigates why cutting off prawns' eyes makes them breed, and asks how we can buy prawns that haven't had their eyes cut off. Matt finds out how much water can be added to formed ham and what that does to the price.