Dan "The Wardog" DaSilva

Castaways hover on the "Edge of Extinction" in an all-new twist, and four returning players attempt to bond with their new tribemates. Also, castaways tackle a giant puzzle in their first immunity challenge of the season.

The castaways' mental toughness is tested on the Edge of Extinction, and targets begin switching from one castaway to another when weaknesses are exposed.

The first castaway is stranded all alone on "Edge of Extinction." Also, first-time players bond together in an attempt to get a returnee out of the game.

The puppet master attempts to pull the strings on other castaways, and one castaway struggles to find balance at an immunity challenge after exhaustion takes its toll.

Spirits are lifted when castaways living "on the edge" read letters that they wrote to themselves before starting this adventure. Also, the final seven castaways battle for immunity during a tough puzzle challenge.

Teamwork is the key to success in an all-new immunity challenge. Also, two castaways attempt to get along while trying to survive.