In one of the biggest surprises of the season so far, and in a program first, Gordon Ramsay enters the kitchen for a mystery box challenge.

With Gordon Week off to a flying start, the bottom three contestants in the invention test roll up to the kitchen ready to cook for their place in the competition with a pressure test.

Our mystery box winner and the top two dishes from the invention test will have the chance to cook for immunity with Gordon Ramsay as their mentor.

The contestants enter the kitchen only to find Gordon Ramsay, who is already yelling at them to hurry up. Divided into two teams, they prepare a three-course meal for 50 diners.

It's the last day of Gordon week. The team who lost the service challenge will have to cook for their lives. The contestants had to recreate a three-Michelin star chicken dish from Restaurant Gordon Ramsay by chef Matt Abé in the two-and a-half hour Pressure Test

The highly anticipated cooking show is back for an incredible 12th season, with a tasty new recipe - and cooking legend Gordon Ramsay will be in the kitchen the ENTIRE first week!Returning to the MasterChef kitchen are 24 much-loved and respected former contestants, Although these familiar faces from the past 11 seasons have forged incredible careers in the food industry, they all have some unfinished business - they are back to win.

Each team must cook a three-course meal for 120 guests. The judges reveal three ingredients: black garlic, ginger and potatoes. Each team must feature one of the ingredients in each course.

Teams must cook a three-course meal in a relay style cook. Each team member starts a course and after 20 minutes must swap to the next course. The most cohesive menu with the best dishes wins.

After impressing the judges in the round robin relay challenge, the winning team are back in the kitchen cooking for immunity and a chance to be safe from the next elimination.

Every contestant is up for elimination, except the winner of the immunity challenge. The pressure mounts for all contestants to deliver delicious dishes and keep their place in the competition.

The contestants discover the mystery box, covered in a Union Jack flag, has been set by guest chef Gordon Ramsay.