Twenty returning castaways are dropped in the middle of the South China Sea to begin their adventure, on the special 90-minute season premiere.The new season in Cambodia, themed "Second Chance," features 20 castaways from past editions who were voted for by fans to have another shot at being named "Sole Survivor." For one tribe, old-school thinking battles new-school strategy when the two distinct groups try to take control of the game. Also, one contestant finds a clue to a hidden immunity idol that requires retrieving it in a way that's never been seen before.