Semifinals 1
The semifinals begin in Las Vegas, where the ninjas take on a longer course featuring 10 iconic obstacles from the past; the fastest will advance to the national finals and compete in head-to-head races.
More from Season 17
Episode 1
Qualifiers 1
Qualifying rounds begin in Las Vegas on the world's most challenging obstacle course. The competition returns bigger than ever by bringing back trailblazers, record-setters, and fan-favorite competitors from the last 16 seasons.
Episode 2
Qualifiers 2
Qualifiers continue in Las Vegas with a special "How to Train Your Dragon" episode; dragons Toothless and Stormfly join the ninjas, and the film's star, Mason Thames, joins Matt and Akbar in the booth.
Episode 3
Qualifiers 3
Qualifying rounds continue in Las Vegas on the world's most challenging obstacle course; the top 20 athletes of the night will advance to the semifinals.
Episode 4
Qualifiers 4
Qualifying rounds continue in Las Vegas on the world's most challenging obstacle course; the top 20 athletes of the night advance to the semifinals.
Episode 5
Qualifiers 5
Qualifying rounds continue in Las Vegas on the world's most challenging obstacle course; the top 20 athletes of the night advance to the semifinals.
Episode 6
Qualifiers 6
Qualifying rounds conclude in Las Vegas on the world's most challenging obstacle course; the top 20 athletes of the night advance to the semifinals.
