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The cookery competition with John Torode and Gregg Wallace reaches knockout week, as the twelve most promising cooks from the heats compete for a place in the semi-final.

In this episode, the second group of six cooks are sent to the Fire Service College in Moreton-in-Marsh, Gloucestershire, where they must cook lunch for 200 firefighters. The college is an award-winning leader in fire and emergency response training, and one of the largest operational fire and rescue training colleges worldwide. The contestants must cook two different main courses (to include meat and vegetarian dishes) and desserts for the hungry firemen and women. Will the contestants manage to hold their nerve and get all their dishes out to the pass on time?

Then, it is back to MasterChef HQ to show John and Gregg what they have learned at the fire college. Still in their teams, they must cook 20 portions of breakfast in just one hour.

In a last chance bid to stay in this year's competition, the weakest individual cooks of the day must face each other in an invention cook-off to determine who will make it through to Friday's show-stopper challenge - the gateway to this year's semi-finals.

Only the best will survive, taking another step towards being crowned MasterChef Champion 2013.