Twenty men and women are marooned on an island. They must band together to find food, water and shelter -- and build a world for themselves. Every week, they vote to expel one person from the island. The last one left on the island wins $1 million. In this installment, the castaways are divided along racial lines -- Caucasian, African-American, Asian-American and Hispanic. As usual, each hour features the patented "Survivor" brand of reward and immunity challenges.