Survivor is an American reality television show produced around the world. Contestants are called castaways by the show and they compete against each other to become the Sole Survivor and win one million dollars. The series first aired in 2000 and as of December 2008 there have been seventeen seasons that have been filmed on five continents. A total of 265 participants have competed and 30 of them have been able to compete in multiple seasons: In 2004, an All-Stars edition aired, with the cast being eighteen past competitors, in 2005 as part of a surprise twist, two past contestants from Survivor: Palau competed again in Survivor: Guatemala and Survivor: Micronesia featured a tribe of ten returning contestants against a tribe of ten new contestants.