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The two highest scoring chefs from Wales must go head-to-head and cook their six-course menus again. But will they take on board their veteran’s advice as they serve a panel of judges and a guest judge from the world of maths and engineering, whose skills are used to work out how to do daredevil stunts on TV?

The chefs need to impress the formidable judges - food writer Matthew Fort, restaurateur Oliver Peyton and broadcaster and food creative Rachel Khoo – as well as a guest judge, which in this episode is Hugh Hunt. Hugh has helped TV speedster Guy Martin ride a wall of death and make the motorbike jump that Steve McQueen couldn’t make in The Great Escape. How will he judge dishes celebrating British science and innovation, including two dishes celebrating an early pioneer of astrophotography?