Big Brother

CBS | 8:00 pm

Big risks can pay off in big rewards for one player — in the form of a $500,000 grand prize — as host Julie Chen Moonves welcomes a new gaggle of Houseguests to tonight's live 90-minute Season 23 premiere. They'll move into a newly redesigned (yes, again) high-tech residence outfitted with 94 HD cameras and more than 113 microphones that capture their every move, every conspiratorial whisper, 24 hours a day. The show airs Sundays, Wednesdays and Thursdays through the summer.