Celebrities from the worlds of music, sport, comedy, drama and show business are heading into the kitchen again. The celebrities up for the culinary challenge in the third week of heats are actors Clarke Peters and Lesley Joseph, former professional footballer Jimmy Bullard, TV presenter Kirsty Gallacher and actor and comedian Richard Blackwood.The first challenge they face is Under the Cloche. In front of each celebrity is a cloche, underneath which is an ingredient. Each celebrity has a different ingredient and must create one dish showcasing that ingredient to demonstrate to the judges they have potential.Next, it's the Street Food Challenge. The celebrities are presented with a street food dish that is popular throughout Japan. They must taste it and try to identify its ingredients. Then, following not a recipe but their instincts, they must cook this classic national dish for themselves. Will their attempts impress, or will they fall short of the mark?Then, in the final test of culinary creativity, the contestants are asked to prepare their Dinner Party Dish - something they would cook to impress if someone was coming round to eat. At the end of this test, one of them will be going home.