Reality titans from the CBS universe compete in the most unpredictable and demanding game of their lives. With an ever-changing game, players are in a constant state of paranoia, unable to trust anyone but themselves. The CBS all-stars compete for a chance to join the upcoming global “War of the Worlds” championship.

American version of the reality game show which follows a group of HouseGuests living together 24 hours a day in the "Big Brother" house, isolated from the outside world but under constant surveillance with no privacy for three months.

Nine previous Big Brother houseguests have received an invitation from Santa to compete in a brand-new game. They'll play in a variety of holiday-themed competitions until just four houseguests remain. One player will walk away with Santa's blessing, and a $100,000 grand prize to boot.

American version of the reality game show which follows a group of HouseGuests living together 24 hours a day in the "Big Brother" house, isolated from the outside world but under constant surveillance with no privacy for three months.

Each Challenge pits numerous cast members from past seasons of reality shows against each other, dividing them into two separate teams according to different criteria, such as gender, which show they first appeared on, whether or not they're veterans or rookies on the show, etc. The two teams compete in numerous missions in order to win prizes and advance in the overall game.

Fifty TV stars are single handedly picked by a mysterious, masked Lion to participate in a competition like no other. Living together in an exotic country mansion and competing against each other in a relentless and unpredictable game, the stars must face challenges posed by the game master while making alliances and developing strategies to avoid elimination.