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It is the second week of heats and eight more hopefuls try to prove to judges John Torode and Gregg Wallace that they have the potential to be the 2017 MasterChef Champion.

This year sees the introduction of the all-new MasterChef market - which is stocked with produce from all around the world, as well as a selection of meat and fish. The first challenge for the eight contestants is to invent and cook one dish using what's available to them in the market. On offer are pork chops, beef mince, kidneys, bone marrow and clams. They have one hour and twenty minutes to dazzle the judges and prove they are good enough to stay in the competition. The stakes are high in this round and it's important to choose wisely because after tasting all eight dishes, John and Gregg decide which five cooks are good enough to stay, while three of the cooks will be sent home.

The five remaining cooks now have one challenge standing between them and a quarter-final place. They have to cook two courses that will excite not just John and Gregg, but also some very special guests. Some of MasterChef's most inspiring winners and finalists return to judge the food of this year's new contenders to the throne. In this heat, the contestants must attempt to impress 2010 MasterChef finalists Alex Rushmer and Tim Kinnaird as well as champion Dhruv Baker.

After the five hopefuls have cooked, John and Gregg will decide which three contestants deserve to take the next step in the competition and go through to Friday's quarter-final. In a competition where only the food matters, these amateurs will need to be good to survive - taking their first step towards being crowned MasterChef Champion 2017.