Pressure Test: Marco Pierre White's John Dory

S8, E7: It takes 20 ovens, miles of stainless steel, an arsenal of appliances and knives that chop, cut, slice and dice, to discover the best amateur chef in Australia. Tasks include mystery boxes, celebrity chef challenges, masterclasses and off-site challenges. The usual elimination format applies. MasterChef experts are George Calombaris, Gary Mehigan and Matt Preston.