In this heat, four more professional chefs arrive from across the nation to compete in the renowned MasterChef kitchen. First, they face the dreaded skills test. Two chefs will try their hand at Marcus Wareing's challenge of preparing scallops with a romesco sauce and a marinated tomato salad. The other two will take on Monica's test to prepare lambs' kidneys served on toast with a madeira mustard sauce.Then the chefs have a chance to rectify any mistakes and impress the judges with two stand-out signature dishes. This is their chance to come back fighting and show the judges what they are made of. Once time is up, the judges will decide which two are to be sent home and which two make it through to this week's quarter-final.