The remaining contestants were given 75 minutes to prepare dishes centering on precipitation in the Invention Test, with the top three joining Sashi in the Immunity Challenge.
Both Khanh's Red team and Reece's Blue team produced standout entrée dishes but the pork fillet main dish Blue was overcooked and the blue cheese mousse Red was unbalanced.
Samira, Khanh and Kristen had the top dishes and Khanh won for the second time to compete for immunity.
It was between Metter and Michelle for elimination, and while the latter's caramel was too dark and bitter, Metter's raw apples and underbaked dense pastry ensured he became the second contestant to be eliminated.
It came down to Jess, whose flavours in her beef salad were unbalanced, and Brendan, who served up a dish with undercooked beef.
The judges and chefs thought Jess impressed with her black sesame ice cream and yuzu curd but her praline cream and macerated raspberries derailed the overall flavour of her dish.