With the final four fighting it out for a spot on the Bathurst grid, the competition is hotting up. To simulate the extreme cockpit temperatures of a V8, the contestants enter a Bikram Yoga studio in a heated Mars Melting Reward Challenge. Full race suits must be worn, while contestants race against the clock to complete a challenging 3D puzzle. Next, Todd and Rick Kelly visit the Jayco Base Camp for a surprise inspection. And Cameron Waters is put on notice when the Kelly boy's confiscate contraband from his trailer.