Jean-Christophe demonstrates how to peel and segment a grapefruit before showing how to fillet a mackerel. The final challenge is preparing the ultimate dish using the fish.

Chef Jean-Christophe Novelli is the judge for the final week. He demonstrates how to cut sweet potatoes into thin matchsticks - allumettes. Then he shows how to fillet turbot into four fillets and sets a challenge - come up with the perfect dish using the fish.