Focus. The fatigued recruits drop from a helicopter into 4-degree water carrying 20kg backpacks, before making their way to shore as a group then racing to the top of a mountain.
In outback NSW, the worst storm in 20 years devastates the Bushmen's and Chris Cheal's mine, while in Coober Pedy, a new team the Blacklighters need opal to re-establish.
Curtis Stone sets this mystery box which is all about the humble potato. Contestants are vying for a place in the semifinal by creating a sweet or savoury dish featuring delicious spuds.