Australian Ninja Warrior is back with 300 Ninjas taking on the World's toughest obstacle course in their quest to become Australia's first Ninja Warrior.

Australian Ninja Warrior is back with 300 Ninjas taking on the World's toughest obstacle course in their quest to become Australia's first Ninja Warrior.

It's the last of the semi-finals and Australia's favourite tradie Sam Goodall leads the charge as the remaining Ninja Warriors fight for the last 8 places in the Grand Final.