Pandora's Box

Pandora's Box is a mysterious door with a golden ? mark on it that is found in the Head of Household room on occasion, making its first appearance in Bloodshed Big Brother during Season 3.

This borrows from the Greek myth of a box that contained all the evils in the world disguised as something good. If opened, the evils would be unleashed upon the world but possibly bring something good with them as well. This holds true in Big Brother, for when the Box is opened, it unleashes something good for the Head of Household and something bad for the house, or something good for the house and something bad for the Head of Household.