Big Brother follows a group of people living together in a house outfitted with more than 100 cameras and 100 microphones, recording their every move 24 hours a day. Each week, someone will be voted out of the house, with the last remaining Houseguest receiving the grand prize of $750,000.

"Big Brother" is set to premiere this week. For Season 27 of the hit reality competition series, the official theme will be "Big Brother: A Summer of Mystery," CBS confirmed Wednesday, July 2.

"So there's going to be a strong reaction in both directions for this mystery Houseguest."Ahead of season 27, here are the 12 best Big Brother seasons to watch, all of which are available to stream on Paramount+.

Big Brother Season 27 premieres July 10 with 17 houseguests entering Hotel Mystère. Get cast details, house tour, and shocking mystery player reveal.

Everything you need to know about ‘Big Brother’ season 27, including how to watch, where to stream the live feeds, and the cast.

Contestants include an aura painter, a dungeon master and a professional bull rider — plus a mystery player whose identity has not yet been revealed