Castaways hover on the “Edge of Extinction” in an all-new twist, and four returning players attempt to bond with their new tribemates.

One tribe will bring balance to their game with an Immunity win. Also, an early showmance could paint a target on a pair of castaway’s backs.

One paranoid castaway calls a tribal meeting to put a stop to side conversations. Also, two castaways bump heads when their Survivor lives are on the line.

After a surprising tribe swap, castaways from the "David" and "Goliath" tribes must learn to work together. Also, a castaway's typical bossy nature could rub her new tribe the wrong way.

One castaway has some scrambling to do after being on the wrong side of the vote. Also, another turbulent storm puts a sudden halt to the game.

Tribes battle to win a food reward for much needed nourishment. Also, the bond between the "Brochachos" becomes a personal achievement for one castaway.

Alliances between the "Davids" and "Goliaths" are tested at the merge. Some castaways may join forces, and a new unlikely pair may choose to work together.

One castaway must do damage control after being called out by their tribe. Also, balance is tested in a stressful immunity challenge.

A quarrel between two castaways could mean the end of a showmance. Also, castaways who win rewards earn a much-needed trip to the burger bar!

Letters from home could fuel castaways' lives in the game! Also, one castaway's negotiation skills for a bigger food supply could pay off...

Emotions are sparked when loved ones visit the castaways. Also, a tribal blindside could create a crack in the Mason-Dixon alliance, and one castaway could break the game wide open by targeting their #1 ally.

One castaway earns a one-in-six chance at the title of Sole Survivor after winning a crucial immunity challenge.

Only four "Goliaths" and two "Davids" remain to face a competitive 63-piece puzzle challenge. Also, a fire-making challenge could change one person's fate in the game, and, after 39 days, one castaway takes home the $1 million dollar prize.

The Season 37 castaways reflect on their experiences.