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As the fourth heat begins, the contestants must hold their nerve in the infamous Invention Test, where they have just one hour to cook an exceptional dish from scratch. No-one goes home after this because next they have to survive the extremely tricky Palate Test - a brand new MasterChef challenge. Chef John Torode demonstrates a Glass Noodle Salad with Chicken and Crab. Without seeing the demo, the amateurs are given just a few minutes to taste this dish before being asked to write down exactly what is in it, using their sense of smell, and palate. Then they are asked to recreate John's dish in just one hour - without a recipe. At the end of these two challenges, some of the hopefuls will have reached the end of their MasterChef journey. Next the remaining contestants must face their first taste of a professional kitchen, as they try to stand up to the pressure of a busy lunch service at London's Mango Tree restaurant.

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In the third quarter final, the best chefs from the week cook their finest two courses for John and Gregg and three MasterChef champions.

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Knockout week continues as the second group of six cook lunch for 200 firefighters. Then, it is back to MasterChef HQ to show what they have learned. The weakest individual cooks of the day must face each other in an invention cook-off.

The final week of the cookery competition begins. The pressure intensifies as judges John Torode and Gregg Wallace send the finalists on a culinary odyssey to Italy.