John Torode and Gregg Wallace look back at moments when their celebrity contestants were pushed to the limits of their culinary skills - from having to impress some of the best chefs in the country to mastering the precision of pastry and the most daunting challenge of them all, the Chefs' Table.The judges also reminisce about a classic challenge from 2017, in which a group of celebrities had to master the creations of world-renowned pastry chef Cherish Finden. And in 2012 Christine Hamilton, Dick Strawbridge and Lisa Faulkner faced a final-week challenge unlike any other. They had to prepare a fine dining lunch from a tiny kitchen on the Orient Express, keeping their culinary skills - and their balance - on track as the train steamed through the British countryside.