The winner of the mystery box challenge and the three best-performing cooks from the invention test will compete for immunity, with Shannon Bennett back in the kitchen to guide and mentor the contestants.

The losing team from the MCG service challenge must face-off in this elimination challenge. The contestants must cook something inspired by the dish that made them fall in love with food.

The amateur cooks are given one hour to recreate their signature dish for the first of the two judges' auditions. The judges introduce the nine past winners of the program, who are there to cheer them on.

The three contestants with the least impressive dishes from the invention test face-off in the pressure test. Queen of the kitchen Maggie Beer enters with the dish to be recreated.

Our 2018 cooks enter the MasterChef kitchen for their first challenge as the top 24. The contestants need to imagine they are hosting the judges at their house for a meal, cooking anything they want.

The 23 cooks enter the kitchen for the first mystery box challenge of the season. This time, the rules are changing: the winner of the mystery box will get a game-changing advantage.

The contestants find themselves on the turf of the iconic MCG for the first team challenge. Split into two teams, each must cook delicious and nutritious food for 50 diners using a different protein.

The bottom three contestants from the previous invention test will face off in this episode's pressure test. The contestants have 75 minutes to complete four of Nigella Lawson's favourite chocolate dishes.

After handing out 18 aprons on the first day of cooking, the judges are looking for six more cooks to round out the top 24. The cooks who were given a second chance will battle it out in a challenge.

In the first elimination challenge of the season, three contestants fight to stay in the competition. They are given 75 minutes to cook, using only the ingredients contained in their fridges from home.

In a team service challenge, it will be a battle of the brunches, as in two groups of 10, they take over two cafes. Contestants will have real customers, with real orders and real dockets.

The winner of the mystery box and the top three from the invention test have the chance to cook for immunity.

George pays a surprise visit to the Masterchef contestant house with a special guest. Together, they reveal the challenge.

The contestants receive a surprise message in the MasterChef house which informs them of their next group challenge and where they'll be travelling to.

The winning contestant from the mystery box challenge joins the top three contestants from the invention test in this episode's two round immunity challenge.

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.

Culinary goddess Nigella Lawson arrives in the kitchen for a week of challenges and surprises. The lid is lifted on Nigella's mystery box to reveal some of her favourite ingredients.

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.

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 bottom three contestants from the invention test face elimination in a pressure test.

The bottom three contestants from the invention test are facing elimination.

The contestants find themselves in the Dandenong Ranges where a fiery team challenge awaits them. To cook a three-course meal, all they have to use is fire.

The losing team from the previous challenge arrive at the kitchen for what will be the last time for one of them.

The judges reveal this is Sweet Week. To kick off the week, they introduce the master of sweets, Adriano Zumbo, who has selected the mystery box ingredients and will reveal the invention test.

The contestants in the losing team are in the kitchen for what will be the last time for one of them. Plus, the first Masterclass of the season with Nigella Lawson.