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Big Brother Season 27 Kicks Off ‘Summer of Mystery’ With New Twists

Live feeds launch July 13 to give fans early access to hidden twists before the companion series debuts July 25.

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Host Julie Chen speaks during the "Big Brother Season 10 Grand Finale" at CBS Radford Studios on September 16, 2008 in Los Angeles, California.
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Overview

  • The season premiered July 10 at 8 p.m. ET on CBS with a 90-minute ‘A Summer of Mystery’ episode hosted by Julie Chen Moonves.
  • Sixteen houseguests entered the Hotel Mystère–themed house alongside an undisclosed 17th mystery contestant who remains under wraps.
  • Key game mechanics include a masked visitor and a secret accomplice integrated into the mansion’s puzzles and challenges.
  • All main episodes stream live or on demand via Paramount+ while 24/7 live feeds begin July 13 at 9:30 p.m. PT on Paramount+ and Pluto TV.
  • Big Brother: Unlocked, a new spin-off featuring never-before-seen footage and cast interviews, premieres on Paramount+ and Pluto TV July 25.