Survivor: Panama
The season had a twist that started in Survivor: Palau called Exile Island. Each week at least one player is sent to Exile Island after the reward challenge, and will return at the immunity challenge. The exile is given a single machete, a flint, a pot and a bucket of dirty water. The island also had a hidden immunity idol that could be used at tribal council after the votes have been made. This gave the person who found the idol an advantage because that person can keep the idol secret until he or she was voted off. When it's played, the person with next highest number of votes would be voted off. Terry found the idol and never needed to use it at a vote, but him having the idol seemed to influence how many other people voted.