Twenty previous winners of Survivor begin their battle for million with a classic challenge to ring in their first immunity win. An all-new twist involving fire tokens is revealed.

One castaway is out for blood after realizing their closest ally was sent to the Edge of Extinction. Another castaway must dig themselves out after letting information slip.

The new-school players attempt to take control against the old-school players in an effort to change up the game. Chaos ensues on Edge of Extinction when an opportunity presents itself.

Castaways are on the edge of breaking down when faced with a grueling opportunity at the Edge of Extinction. Also, Survivor veterans begin to target each other.

Tribes drop their buffs and switch things up in the game. Tension on one tribe opens up an opportunity for new alliances.

The immunity challenge weighs heavily on the castaways when 2 tribes are sent to tribal council. One castaway on Edge of Extinction is acting sneaky.

Some winners sprint their way to an opportunity to gain an edge over the other castaways. One tribe employs a different strategy in a rigorous immunity challenge.

With the old-school players living on Edge of Extinction, it's merge time for the new-school castaways.

Things get tense for the remaining castaways during a chaotic tribal council. Also, a kind gesture could paint a target on someone's back, and one person is the last one standing in a taxing immunity challenge.

Winners at War put the game aside for a heartfelt moment with their loved ones until a wild tribal council sends the 12th person to the Edge of Extinction.

One castaway plays double agent and goes undercover to infiltrate a group they want to vote out. One player who has been playing it cool finally goes to work to search for an idol.

Alliances may crumble after a tribal blindside. An undercover operation escalates to new heights. Those on the Edge of Extinction get another brutal challenge.

In a crucial immunity challenge, the remaining 7 castaways make their final push towards the million prize.

One player wins million and becomes the second person to win Survivor twice on the finale of Survivor: Winners at War.

Probst virtually connects by video with all 20 players to discuss the highlights of the season.