In the QuickFire challenge the chefs go back to their culinary roots to be tested by guest judge Chef John Higgins on the five French mother sauces. And later in the Elimination Challenge, the chefs are split into two teams to create three-course progressive menus showcasing the diverse and decadent flavours of Middle Eastern cuisine. Acclaimed cookbook author and master of middle-eastern cooking Sabrina Ghayour joins as guest judge at Diwan, Chef McEwan's restaurant in the Aga Khan museum.

In the QuickFire Challenge, culinary superstar Daniel Boulud asks the chefs to re-create some of his favourite dishes…but the All-Stars are in for a very unexpected twist. The Elimination Challenge features a Top Chef first as the chefs are split into two teams to create the ultimate menu on-the-go for Retail Wars! Joining as guest judge is world-famous chef and retail food maven Lidia Bastianich.