One tribe member becomes dehydrated due to a lack of fire to purify drinking water. In the Aitutaki camp, the members consider throwing the immunity challenge so they can vote Billy out. Castaways from the Puka Puka tribe become increasingly annoyed with Cao Boi's controversial comments.The first Immunity/Reward Challenge consists of the following rules: The must complete a seven piece puzzle which will create a boat. They will paddle back to shore and carry the boat back on the beach. There they will use the puzzle together using the boat pieces to create a ladder. They will climb the ladder light their fire. The first three to do so win flint. Those who finish in first place win a fire kit with kindling, waterproof matches and kerosene.