One-off special in which four previous finalists show Monica Galetti, Marcus Wareing and Gregg Wallace how appearing on the famous cooking show has had an impact on their careers, before facing two demanding challenges.Taking part are Philli Armitage-Mattin, Santosh Shah, Bart van der Lee and Jamie Park, and Monica and Marcus throw them in at the deep end by getting them to cook for restaurant critics Grace Dent, Jimi Famurewa and Jay Rayner, who all have high hopes. In the second round, they have to cook a festive centrepiece - and as this could win them the title they go all out to deliver a showstopping feast.