The top four contestants cook-off for immunity. The winner must then try and out-cook guest chef Victor Liong from Lee Ho Fook.
Contestants must choose between three of the most difficult invention test dishes from previous seasons.
A fete in Negella Lawson's name is held and the contestants are split off into three teams. The teams must prepare one savoury dish and two sweet dishes to sell, with all proceeds donated to the Royal Children's Hospital.
In a MasterChef Australia first the mystery box challenge has been chosen by the viewers. Contestants have 75 minutes to create a dish using at least one ingredient chosen by the viewers.
The bottom three contestants face off in the Pressure Test to avoid elimination.
