Each series of "The Mole" involves ten contestants. During each episode, the contestants participate in a number of challenges, each assigned a monetary value. However, one of these contestants has been selected by production to be the Mole; it's his or her job is to try to prevent the other players from winning challenges without revealing himself or herself to others. The Mole may be told ahead of time of how to do this or what challenges to expect, while at other times the Mole must decide whether to intervene or not.