The second of two Semi Finals, tonight some of the biggest names in Australian Ninja Warrior tackle one of the hardest Semi Final courses ever!

The biggest names in Australian Ninja Warrior take on a brutal obstacle course with 3:45 on the clock and a spot in Grand Final Stage 2 up for grabs.

It's the Grand Final and the biggest night in Australian Ninja Warrior's History. Eight Ninjas will attempt to climb Mount Midoriyama to become Australia's first Ninja Warrior.