Vegetables, Wine, Biscuits

Jimmy Doherty investigates supermarkets' stringent criteria for the perfect vegetable, and the incredible lengths to which farmers go to grow produce that looks more attractive. In America, Kate Quiton examines why wine is getting stronger and learns about a machine that has been removing excess alcohol from some Californian wines since the 1990s. Matt Tebbutt takes on the ultimate tea-break challenge as he tries to settle an age-old dispute once and for all: which biscuit is best for dunking?