It's the first of the semi-finals and the six best cooks from around the country are competing for the trophy. They face their most daunting challenge so far - cooking at London Zoo. Split into two teams of three, they must prepare a sumptuous two-course lunch for the penguin keepers, using basic outside kitchens and with only barbecues to cook on. The contestants now need to work as a team as well as battle the wind and rain to produce a fancy two-course lunch on time. Then it's back to the MasterChef kitchen, where they must cook just one exceptional dish to stay in the competition. The young culinary stars will have to cook their hearts out to impress because this is the knock-outs and at the end of the cook-off, two contestants will be sent home.