Check In, Checkmate: Summer of Mystery Coming to Big Brother

Posted By: John Powell

July 2, 2025

Check In, Checkmate: Summer of Mystery Coming to Big Brother

Julie Chen Moonves, Host of the CBS Original Series BIG BROTHER. -- Photo: Diana King/CBS.

By John Powell – GlobalTV.com

A Summer of Mystery full of twists and turns is coming to Big Brother. Producers have turned the house into Hotel Mystère for seasonm 27, “a place where secrets lurk behind every door and nothing is as it seems”.

The premiere will be filled with unexpected twists and turns including a masked visitor, a secret accomplice and the shocking arrival of a Mystery Houseguest whose identity CBS is keeping a secret…for now.

Here is a summary of the Summer of Mystery House Highlights:

• Mystery Hotel Theme: The Big Brother house is transformed into a suspense-filled hotel, complete with secrets, hidden passageways and a mysterious vibe that sets the stage for a summer of intrigue.

• Reception Area: Houseguests are welcomed by a wall of 75 key boxes, some filled with skeleton keys and other clues that might reveal themselves later in the game.

• Living Room Chess Guardians: Towering 22-foot walls and a balcony lined with giant plaster chess pieces (bishop, queen, king, knight) watch over the house, adding a regal and strategic flair.

• Attic Bedroom of Oddities: Beds made from wooden crates, rubber masks on the walls and haunted artifacts like a black knight’s helmet and diving suit make this room a spooky treasure trove.

• Sleeper Car Bunk Room: Behind a secret entrance, this train-themed bedroom straight out of a murder mystery novel contains bunkbeds for six Houseguests (the first time the BB house has had bunk beds since season one!) and a sleek Art Deco design.

• Rooftop Garden Kitchen: The kitchen and dining area mimic a rooftop garden with ivy-covered walls, sunset skies and a 10-foot round garden party table under string lights.

• Secretive “Wine Cellar”: A moody, bottle-lined cellar (with no actual wine, sorry Houseguests) is a perfect spot for whispering secrets and plotting moves.

• Victorian Conservatory Lounge: A lush, plant-filled room with a 13-foot green velvet lounge and a plum tree, ideal for quiet strategy sessions

• Venom Lounge and Poison Bar: Upstairs, snakes slither across the wallpaper in a moody lounge featuring a “Poison Bar,” (don’t worry, there is no actual poison) a velvet daybed and ravens stealing party lights

• Boxing Ring Gym: The gym includes a full boxing ring, heavy bag and workout gear – great for blowing off steam and staying in top sleuthing shape.

A reminder: Big Brother season 27 kicks off with a 90-minute premiere Thursday, July 10 (8:00-9:30 PM, ET/PT) followed by a 90-minute Sunday episode Sunday, July 13 (8:00-9:30 PM, ET/PT).

After its premiere, the series will air Wednesdays (8:00-9:30 PM, ET/delayed PT) expanded from its regular 60-minute episodes, followed by hour-long shows on Thursdays – featuring live evictions – and Sundays (8:00-9:00 PM, ET/delayed PT).

On Fridays, watch Big Brother: Unlocked as three BB All-Stars offer never-before-seen broadcast footage from the house, exclusive interviews, surprise guest appearances and unprecedented behind-the-scenes access. Former Houseguests share firsthand insight and expertise as they analyze gameplay, assess the competition and give their insider’s perspective every other Friday starting Friday, July 25 (8:00-9:00 PM, ET/PT).

Set Plates of the Big Brother House for season 27 of the CBS Original Series BIG BROTHER, scheduled to air on the CBS Television Network. — Photo: Matthew Taplinger ©2025 CBS Broadcasting, Inc. All Rights Reserved.