Season Premiere. With the culinary bar set high in 2014, the heat will be on as MasterChef Australia returns for 2015. Home cooks from around the country begin the battle for the title of Australia's next MasterChef.

In their first challenge, the contestants have 75 minutes to make a savoury dish in order to secure themselves a spot in the Top 24. Which contestants will claim the last remaining aprons?

The Top 24 contestants enter the MasterChef Australia kitchen for their first mystery box challenge.

The contestants must break into three teams and battle it out in the first team challenge.

In today's very fishy challenge, the eight contestants from the losing team in yesterday's task must face off to stay in the competition.

The mystery box is revealed as today's challenge. It is their chance to show the judges what they are made of and the winning dish will gain an advantage going into the invention test.

The three contestants with the least impressive dishes from the previous invention test face off in the pressure test. One contestant will cook their last dish in the MasterChef Australia kitchen.

Today the three best-performing contestants in the invention test will compete for immunity. The judges reveal that each contestant must first cook a sweet or savoury dish using a jaffle iron.

The remaining 22 contestants must team up and cook a two-course meal, a main and a dessert, for 120 guests made up of serving Army personnel, Legacy guests and their families.

The losing team from yesterday's challenge must cook-off to keep their place in the competition. The contestant with the least impressive dish will be eliminated from MasterChef Australia.

The contestants arrive at the MasterChef Australia kitchen to find Marco Pierre White there to greet them. Today's mystery box challenge is all about the five fundamental tastes in the human palate.

The three contestants with the least impressive dish from the previous invention test face off in the pressure test. At the end of the challenge, one of these contestants will be going home.

The three best performers in the invention test are vying for immunity. Marco Pierre White sets them a 30 minute challenge with unlimited pantry access.

In today's challenge, the contestants are split into four teams, with each team cooking in a relay. All five members of the team with the least impressive dish will go into tomorrow's elimination.

In tonight's elimination, contestants must prepare a single dish plated into five identical serves, one for each of the four judges and one for the cook who will have the honour of dining with the judges. Closing out the episode with Marco Pierre White is the first MasterClass of the season. The contestants are joined by our judges at the picturesque Burnham Beeches.

In a very special episode, the Queen of the Australian kitchen, Maggie Beer returns to the MasterChef Australia kitchen as the 19 contestants face another mystery box challenge.

The judges reveal that today's pressure test has been set by a rising star in the dessert world, guest chef Anna. The contestant with the least impressive dish will leave the competition.

With guest mentor Shannon Bennett leading today's challenge, has our amateur MasterChef cook got what it takes to out-perform one of the best?

In an off-site team challenge, the contestants will be taking over the bakery at Melbourne's iconic Abbotsford Convent.

The losing team of nine cooks face off in the elimination challenge and the contestant with the least impressive dish in round three will leave the kitchen.

The judges tell the 17 contestants to realise their food dreams. Plus, past contestants return to showcase their skills.

The three contestants in this episodes pressure test see former season four contestant Kylie Millar enter the kitchen. Plus, we say goodbye as one contestant will cook their last dish.

The three best performers in the invention test are vying for immunity. The winner of round one will cook off against season two runner-up Callum Hann.

This episodes challenge is to cook Mexican street food for a huge crowd of 500 guests, with three and a half hours to prepare and ninety minutes to serve as many people as possible.

The eight members of the losing team from the Mexican challenge are facing elimination. With 90 minutes on the clock and an open pantry, the contestants must re-invent a classic French dish.