The hunt for a champion continues as the final four celebrities are welcomed to the challenge. Trying to impress judges John Torode and Gregg Wallace are sporting legends boxer Joe Calzaghe and cricketer Matthew Hoggard, Mercury Award winning rapper Speech Debelle and entertainer Les Dennis. The first challenge is a mystery box test. Requiring technical skill and a creative flair, the celebrities must design their own unique dish from a range of mystery ingredients including a whole squid. With only 50 minutes to create their dish, they will have to think fast if they're to impress the judges. In the fearsome palate test, John attempts to turn the celebrities into pastry chefs when he demonstrates, for viewers only, a spiced fig tart tatin with praline and orange and rose water cream. Without seeing the demo, the celebrities are given just a few minutes to taste this dish, before being asked to write down exactly what it is in it, using their sense of smell and palate. They are then asked to recreate John's dish in just 45 minutes - without a recipe, using skill and palate alone. Finally, the celebrities are sent into the terrifying world of mass catering, with a particularly hungry group of mouths to feed. The internationally renowned rugby union team Harlequins are in training for an important match and it is the celebrities' job to not only ensure that the team and support staff are fed on time, but also with food suitable for top sportsmen. It is a tough enough task as it is, but when the celebs find themselves one man down the challenge becomes even more daunting.

• Lisa Faulkner
• Simon Shepherd
• Pete Waterman