The warriors are BACK on the course and ready to dominate!

They're ordinary people defying the odds... A new season of 'American Ninja Warrior' gets underway tonight on NBC 12.

Preview Season 9 below and watch a special two-hour season premiere at 8:00 on NBC 12, followed by new show 'Spartan: Ultimate Team Challenge'.

Cannonball Slider on Ninja Warrior

Building the Ninja Warrior Course