Brent Draper

The judges are joined by special guest Jamie Oliver, as the contestants prepare for a season of secrets and surprises.

The contestants take a trip down memory lane with a '70s-themed dinner party, where a little fermented curd does the trick. The culinary time travel leads to a tearful farewell.

With elimination looming, the contestants embark on a two-day challenge, needing to marinate, pickle, brine and more in an overnight cook.

There's a catch to the flavour bombs that Jamie Oliver has left behind for the contestants to cook with. They will only be revealed 15 minutes into the cook and must be included in the dish.

Maggie Beer visits the kitchen to inspire the contestants as they prepare to battle it out in a two-round Elimination Challenge.

Jamie Oliver returns for another day in the kitchen, as contestants battle to secure a place in the first immunity challenge.