The format of Big Brother in Canada remains largely unchanged from the American version, making it the only two versions in the series to adopt this format so far. Family guests are quarantined in Big Brother's house and have no contact with the outside world. Every week, HouseGuests participate in several mandatory challenges to determine who will win food, luxury goods, and the opportunity to become the head of household (HoH) or veterinary power (PoV). The winner of the weekly HoH competition is not nominated and two HouseGuest companions are nominated for expulsion. The two HouseGuests nominated for expulsion are also referred to as "expelled persons"; On the block; Expulsion. After HouseGuest becomes a HoH, he or she is not eligible to participate in the next HoH competition. The winner of the PoV competition will win the right to save a nominated HouseGuests from eviction and take them off the block. If the PoV winner exercises power, HoH nominates another HouseGuest to go...