With semi-final spots filling fast, who will make it through tonight? All eyes are on one of Australia's favourite Ninjas from last season, "Deadly" Jack Wilson.

In the last of the heats the lightest and heaviest Ninjas compete, plus Bachelor Tim Robards and the first woman to scale the warped wall last season, Andrea Hah.

Only the very best made it through the heats, but now the competition steps up a gear as we enter the semi-finals of Australian Ninja Warrior.