Who will win? Who will be the Mole? Everyone thinks they know who it is and relationships are being tested but ultimately Thao leaves. Ann-Marie didn't like her on the outside but she may have liked her more inside.

Bodybuilder Joe is eliminated this episode after a great performance. Some people suspected he was the Mole. Clearly they were wrong. Suspicions go to Marc and Alaina now as their strategies in a murder mystery fail them. But are Crystal-Rose and David being ignored? Or is it Bob who is the Mole? As the series draws closer to the finale, we'll see...

In this round, Crystal-Rose scores herself a free pass while Alaina and Marc ruin one of the group's challenges. But it is Pete, everyone's favourite, who is eliminated. So who is the Mole? At the halfway mark it seems anyone could be the traitor. But there are clues. Keep looking, Australia! And then Crystal-Rose was offered $20,000 to the group's kitty if she passed up the elimination.

There are 6 left - Is it Alaina, Crystal-Rose or Bob? or someone else? David almost loses the first challenge for the team, having to repeat his part after breaking a road rule. He only makes it home in 2 seconds to spare. Alaina also doesn't help. Through luck alone, Alaina, Crystal-Rose & Marc photograph four native species which contribute to the group's kitty. Bob and the others only manage to get 2 and one of them is doubtful. However, Crystal-Rose, Bob, Marc & Alaina all don't make it through a series of laser beams in the final challenge. Did they do it deliberately? David risks it all to bring home more points and Ann-Maree runs out of time. It seems anyone could have sabotaged these challenges. That night at the elimination, Bob and Alaina say they would like the other to leave. Both of them suspect Marc. He suspects Bob as does David. Crystal suspects David.

The first challenge - dropping water bombs onto a target from a paraglider, doesn't go well as only Alaina gets a hit. Bob, who was betting on the success, does better. Alaina, Bob & Ann-Maree have to take pictures to represent different letters of the alphabet (e.g. B=bridge, a Y shaped track in the road). The letters spell out BETRAY but Crystal-Rose and Marc, who have to guess what it is, don't get it right. The three others also have to tell what Crystal and Marc have painted on a sports oval. While Ann-Maree thinks it is a platypus, Alaina convinces her and Bob it is a mole and they lose money. It was, in fact, a platypus. As the contestants voice their suspicions, they fill out the questionnaire. Both Alaina and Marc are certain it is Crystal-Rose and Bob agrees with them but also thinks Alaina is a good suspect. Ann-Maree suspects Bob (whom Marc has ruled out) and Crystal is torn between Alaina and Marc although she suspects Marc more.