Copyright 2009 Monty Brinton / CBS

This season's "Survivor" promises to be one of the harshest and most heartpounding yet, as the 16 hopefuls are left stranded for 39 days in the river oasis called the Rio Novo, located in the Brazilian Highlands. The castaways will be battling blistering temperatures, violent downpours, dangerous wildlife and most treacherous of all -- each other. Who will be named the Sole Survivor and walk away with $1 million? Tune in to CBS' "Survivor: Tocantins" Thursday nights beginning Feb. 13 to find out.