American Ninja Warrior: Ninja vs. Ninja

Flip Rodriguez, and "the Cowboy Ninja", Lance Pekus lead two of the top teams in the fourth week of competition. Another strong group of ninja superstars competes in the fourth qualifying episode - led by Flip Rodriguez and his "Team Ronin". Lance Pekus is captain of "The Wild Bunch". Noah Kaufmann leads "The Think Tank", and Karson Voiles' team is called "Karsonic Boom".

Geoff Britten captains the Ninja Brittens; Michelle Warnky and brothers Chris and Brian Wilczewski comprise the Lab Rats; Elet Hall captains the Elet-Tricks; Daniel Gil leads the Iron Grips.

Brian Arnold captains Party Time; Drew Drechsel leads the Real Life Ninjas; Jamie Rahn commands the Rahn-aways; Abel Gonzalez captains the InviciAbels.