Idol Halves is a twist that featured in Survivor: Great Britain. The twist changed up the way Hidden Immunity Idols were found for that season, and gave the potential for more than two idols to be present at one time in the game.
Each person starts the game with half of a Hidden Immunity Idol. This half, when joined with another half creates a full idol which can be played any when up to the Final Five. The other half of each idol is owned by someone on the opposite tribe. Castaways must correctly guess who that person is to 'snatch' their half of the idol for them to create one full one which can be played. However if their half of the idol gets 'snatched' by someone else, they will get told by the host that it has happened, and will therefore no longer be in possession of an idol half. Getting your half of the idol 'snatched' has good and bad consequences. The good thing is that you now know someone on the other tribe has a full idol because they took your half, but the person who took it knows who you are an knows it is impossible for you to get an idol now, which makes you slightly vulnerable. So that is why it is the castaway's choice if they tell their own tribe that their half has been stolen. If the person who has the half of an idol gets voted off before the castaway which owns the other half can take it, then tough luck. Halves owned by voted out players are permanently removed from the game, and if the person owning the other half of your idol is out, then it is impossible to make a full idol which you can play. Castaways need to make sure they get the other half of the idol BEFORE that person is voted off or they snatch their half. The person who snatches the half and makes a full idol will know who it is they snatched from, and will know it is impossible for them to get an idol. The person who gets their piece snatched from their hands however does not know who snatched it. This twist means that multiple idols could be in play at one time if people are lucky enough, or it could mean that no idols end up in play either. Castaways only get one guess at who the person with the other half of your idol is each day. This guess is allowed to be taken from between the end of each Immunity Challenge, up until the reading of the votes.
The idol's appearance is similar to the small necklace-style of the standard Hidden Immunity Idol, however has two distinct halves which can be split apart and joined together. In Survivor: Great Britain, the color and mask of the half signified which tribe that half was originally with. The purple half with the mask of comedy was the Buckingham half, and the orange half with the mask of tragedy was the Windsor half.
- Alexandra A. correctly guessed that the person with her idol half was John P., and gained a full idol. Alexandra played this idol at the first merged tribal, negating four votes against her by Buckingham and ultimately putting Windsor in the majority.
- Evan T. correctly guessed that the person with his idol half was Matt K., and gained a full idol. He, like Alexandra, played this idol at the first Tribal Council to ensure his safety after he double-crossed the Buckingham tribe. He did not need to play it however, because they all voted for Alexandra.
- Kiko R. correctly guessed that the person with his idol half was Chris D., and gained a full idol. Unlike his tribe mates, he hung onto this idol, not playing it until the the last time he could at final five, where it negated two votes against him and ensured the swift removal of Dylan J. from the game.