Heat 2 features the 'Battle of the Tradies', the only huband and wife team, Queenslander larrikin mates and a former elite gymnast from WA.

Tonight, 50 new competitors face the Ninja course. Three new obstacles make their debut in Heat 3: The Bomb Slider, The Cargo with Lache and The Ball and Chain.

Tonight, Ninja Island will host its first Battle of the Codes when NRL Star and Footy show host, Beau Ryan steps up to the podium against AFL Star, Adam Cooney.