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In the first of the heats, the first batch of five celebrities undertakes three tough culinary challenges in a bid to prove their cookery talent to judges John Torode and Gregg Wallace. Hoping to show they've got what it takes are former supermodel Jodie Kidd, actor Sophie Thompson, author and broadcaster Russell Grant, fashion journalist Susannah Constantine and actor Todd Carty.

The first challenge for the five hopefuls is the Mystery Box test - the infamous test of imagination and creativity. They all have to use the box's ingredients to create a delicious stuffing and wrapping for their own version of spring rolls and a dipping sauce. With nerves running high and just 50 minutes to make them from the scratch, the celebrities must think on their feet to impress the judges.

Then, the celebrities are split into two groups to take on the challenge of cooking for the first time in a restaurant kitchen, preparing dishes for paying customers. Jodie and Russell head to Babbo which specialises in traditional Italian cuisine while Susannah, Sophie and Todd are sent to Aqua Shard. For both groups the cracks begin to appear as they fight to keep on top of customer orders and for some the pressure is just too much.

In the final test of culinary creativity its back to MasterChef headquarters as the contestants are asked to prepare a two-course menu of their own design in just one hour and 15 minutes. The celebrities work furiously in a last attempt to prove themselves to the judges, because at the end of this test one of them will be going home.