The newly formed pairs of Challenge Vets and New Threats must put their partnership to the test immediately; a rivalry causes chaos and uncertainty, leading to a drama-filled nominations; a nail-biting elimination sends shockwave.

TJ throws a huge wrench in the players' plans, making an ever-changing game even more difficult; two challengers get hot and heavy, making another begin to boil over with jealousy; the elimination sees the first head banger.

One player's game is at risk, while their partner's competitiveness rears its ugly head and wishes it hadn't. The challenge tests the players' swimming skills for the first time and an added element makes some of the veterans lose their minds.

The stakes are sky high, as one veteran shocks the house by getting last in the challenge. Hangnail, Gabe, looks to make a high risk move to earn back some favor. The challenge tests the players' sense of direction and sudoku.

Loose lips, sink ships; one player's inability to keep a secret puts a target on them; the first-ever Challenge Grand Prix sees a speedy go-kart and a series of puzzles; things start to heat up.