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Today, eight more amateurs 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 full of 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 today are duck legs, ox tail, lamb mince, langoustine, cod and scallops. They have one hour and 20 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 more 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 tonight's heat, the contestants must attempt to impress 2006 finalist Dean Edwards as well as champions Ping Coombes (2014) and Thomasina Miers (2005).

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.