It's knockout week, and the 12 best chefs from the heats are back to compete against each other for the first time. They will need to raise the bar, as the pressure is ramped up. This week is all about getting a place in the semi-finals, and these fearless competitors will need to outshine the competition to get there.The terrifying invention test returns. Marcus, Monica and Gregg want each of the 12 to create a dish that sings on every front. Only stunning presentation matched with exceptional flavours will have the judges sit up and take notice. Standing out in this strong group of chefs won't be easy.The judges will pick their favourites who then go straight through to the next round. Those that aren't quite up to scratch will go another round in the kitchen to earn the right to stay in the competition. If they cooked savoury last round, they will cook sweet - and vice versa. They will have whatever is left of the ingredients to play with, but they'll need to pull it out the bag to get through, as there will not be any third chances.Two will be given their marching orders, and those who have impressed will step up to the next challenge, as the race for this year's title hots up like never before.