Tonight is the first Semi Final if the Ninjas thought the heats were tough, they haven't seen anything yet!

It's the second of the three semi finals and 30 Ninjas will take their shot at glory. Only 7 can qualify for the Grand Final and a shot at conquering Mount Midoriyama.

Eight episodes in, Australian Ninja Warrior has lived up to its global reputation. It truly is the toughest, most challenging obstacle course in the world.