Semifinals 1

S12 E5: Qualifying is over and it's time to step it up for the competition's Semi-Finals! Competitors will face up to ten daunting obstacles including the head-spinning Corkscrew and mechanical Clockwork, which are new to the course this season, in addition to fan favorites such as the Salmon Ladder and the iconic Warped Wall. Notable competitors include Daniel Gil, Jesse Labreck, Sandy Zimmerman, Jody Avila and Grant McCartney. Matt Iseman and Akbar Gbajabiamila host and Zuri Hall reports from the sidelines.