After the shock events of the beach party, the battle lines are temporarily dropped between the Tigers and Sharks as we enter the third week in paradise. But there's little time to reflect as it's the start of Tribal Challenge Week and there's a big twist in store. Both islands are in a state of uncertainty as there are no new arrivals. Tribal Challenge Week kicks off with a swim-based trial with the results to be revealed at the beach party. And there's a big surprise for the winning team: five new arrivals in one go! But just how will the five newbies feature in the gameplay of the final week of the Shipwrecked competition?