The fourth season begins in Venice Beach, California on the Southwest course featuring the Quad Steps, Log Grip, Spinning Log, Jump Hang, Devil Steps, and Warped Wall. Veteran ninjas include stuntman Brent Steffensen, speedy Michael "Frosti" Zernow, Universal Hollywood's Dan Mast, and stuntwoman Luci Romberg, while actor William Moseley and YouTube parkour sensation Jesse La Flair take on the course for the first time.