In the last of the quarter-finals, the best chefs from the week's heats come together in the kitchen to cook against each other and continue in their quest for the title. The first test the professionals face is to reinvent a sweet family favourite, fruit crumble. The chefs need to deliver a dish that sets them apart because only four chefs will have the chance to cook for the critics. The remaining four chefs have just one hour and 15 minutes to serve up an exceptional two-course menu to three of the country's most notable restaurant critics. Newcomer Grace Dent joins Jay Rayner and Tracey MacLeod at this week's table. This culinary ensemble is accustomed to dining at some of the UK's most exciting destinations and will only be won over by the very best. After a tough session in the kitchen, one more chef's ambitions will be thwarted when they are sent home. The three remaining chefs move into knockout week.

Only ten outstanding chefs remain in the competition, and now they have been split into two groups. The first group of five are set two daunting challenges by Marcus and Monica. The professionals must prove they can work as a team when they are asked to create an exceptional dinner at the prestigious Royal Society of Medicine. The chefs have two and a half hours to create and cook a three-course fine-dining menu for the president and his guests. The menu must meet the expectations of the president, his guests and the judges. Finally, the chefs have 90 minutes to cook one showstopper dish for Marcus and Monica. At this level, only their very best will be good enough in this make or break round. It is a tense, thrilling battle and any mistake could cost them their place in the competition. Once they have tasted the five dishes, Monica and Marcus decide which chefs are good enough to become semi-finalists.