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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.
It's a night of shock exits, sensational runs and history making feats when Australia's biggest Ninja superstars battle the course.
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.