ET exclusively debuts the three-minute featurette previewing the dramatic new season, featuringa sneak peek at the ninjas, rule changes and returning hosts Matt Iseman, Akbar Gbaja-Biamila and Kristine Leahy.
Celebrities brave the course for 'American Ninja Warrior's' second annual Red Nose Day edition, including one intrepid ET reporter. 'Celebrity Ninja Warrior' kicks off Red Nose Day night, May 24, at 8 p.m. ET.