Using journals, players must track vast amounts of data about the person(s) they suspect of being the Mole, such as seating positions, clothing colours, minor discussion topics, and so on.

The quiz at the end of each episode tests players' knowledge of the Mole, and determines by lowest score (or slowest time, in the event of a tie) who is eliminated from the game.

However, one of these contestants has been selected by production to be the Mole; it's their job to try to prevent the other players from winning challenges without revealing themself to others.

To eliminate someone, all contestants take a quiz (which consists of 20 questions) at the end of every episode regarding the identity of the Mole and their involvement in the previous activities.

While success in the challenges builds up potential winnings, it is also critical to stay in the game by scoring better than opponents on the quiz, usually by attempting to draw their suspicions of the Mole's identity toward oneself.