Plot: It's the last of semi-finals and it's do-or-die for the best six amateurs as they cook-off to win a coveted place in the prestigious MasterChef finals. The contestants have just one challenge to win a place in the final five; to cook an outstanding dish to win-over three of the country's most-feared restaurant critics -Tracey MacLeod, Tom Parker Bowles and Fay Maschler