Zoey gives up hope that she'll ever see Mike again and tells Mal the jig is up. With a little help from some of the previously eliminated, Mal and Zoey face off in a horrifying final challenge called Circles of Doom.

The final four hunt for pirate treasure and a spot in the Grand Finale in a challenge that becomes truly life-threatening when Mike's malevolent alter ego gets involved.

The final five All-Stars race to the most dangerous regions of the island to find ingredients for the ultimate Sundae.

The All-Stars face the Boot Camp from Hell as they struggle to survive the harshest obstacle course ever.

The 100th episode celebrations are cut short when Ezekiel kidnaps Chris, and the All-Stars head out in search of their host.

The challenge is a simple life-or-death boat race around the island but things get complicated when Chris messes with team dynamics.

Chris orchestrates a brutal boxing free-for-all that pits the All-Stars against their biggest, baddest enemies.

The teams travel to Boney Island for an egg hunt inside The Fun Zone, which is anything but fun.

During a race across the island, the local wildlife is radically altered by the rare blue harvest moon, and even the littlest bunny becomes a blood-thirsty predator.

Chris combines a pancake-eating contest with an obstacle course in the ultimate tummy twister. Meanwhile, sparks fly between newly Villain-ised Courtney and Scott.

The Heroic Hamsters and Villainous Vultures race into the forest to collect unusual paintball weaponry and use it to pick off the other team - last team standing wins.

The players gather on the beach to dig up 3D puzzle pieces and use them to assemble an international landmark - but that's easier said than done.

Chris brings back players from both casts for an All-Star season and the Heroic Hamsters battle the Villainous Vultures for a night in the luxurious Spa Hotel.