The endgame of Big Brother 27 is here. With less than three weeks until the finale, the long-absent Mastermind has returned with a twist no one saw coming. A sneak peek of Episode 29 reveals that the masked villain is unleashing what they call the “Month of Mayhem.” It starts with an unprecedented elimination that instantly sends one houseguest to the jury.
The Mastermind’s Return
Fans will remember the Mastermind’s dramatic introduction back in July. They kidnapped Julie Chen, stole the Head of Household power, and even managed to sneak into the house. After weeks of silence, the mysterious figure has reappeared during a backyard beach bash at the “White Locust Resort.” What began as a celebration for the remaining nine players quickly soured. The Mastermind greeted them with a chilling announcement.
“I’ve invited you all to my resort to kick off what I’m calling the Mastermind’s Month of Mayhem,” they declare in the clip. The mood instantly shifts. The players realize that someone’s game will end that very night. The Mastermind adds ominously, “It starts with a bang…for one of you, it will be your last.”
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A Psychological Minefield
The Mastermind reveals that the houseguests will face a “psychological minefield.” It is designed to test both their competition skills and social gameplay. The stakes are brutal: within hours, one contestant will be eliminated outside of the usual Veto or Block Buster process. This unlucky player will become the first member of the jury, crushing their dreams of the $750,000 grand prize.
While Big Brother has experimented with unusual eliminations before—like Jodi Rollins on Night 1 in Season 14 or Glenn Garcia in Season 18—this marks the first time in the franchise’s 25-year history that such a twist has occurred so late in the game. The sudden elimination has blindsided both the houseguests and the audience. It proves that nothing is safe in the “Month of Mayhem.”
Tyler Crispen Joins the Chaos
To add another layer of intrigue, the Mastermind has enlisted outside help. Tyler Crispen, the two-time player and Season 20 runner-up, appears as the Mastermind’s “concierge.” His cameo was first teased on Big Brother Unlocked. Now he’s stepping back into the house to assist in carrying out this new round of mayhem. The return of a familiar face only deepens the uncertainty surrounding the twist.
What’s Next for the Houseguests?
The remaining nine players now face the daunting task of navigating the Mastermind’s unpredictable games. With one elimination already set in motion and the “Month of Mayhem” promised to continue, it’s clear that this stretch of Big Brother 27 will be unlike any before. Celebration has turned to devastation, and the countdown to the finale is now filled with more dread than anticipation.
Catch the drama unfold as Big Brother 27 airs tonight, September 9, 2025, at 8:00 p.m. ET/PT on CBS. If this sneak peek is any indication, the road to the $750,000 prize is about to get more treacherous than ever.
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