Big Brother Season 27 premiered on July 10, 2025, on CBS. Titled “Summer of Mystery,” the new season features 16 houseguests, a secret guest, and a masked intruder. Episodes air three times weekly.

The latest “Big Brother” season debuted on July 10, and is scheduled to continue airing over the next three months leading up to the finale.

Following the premiere of the first CBS episode on Sunday, fans may watch Big Brother Season 27 live streams directly on Paramount+ Premium and Pluto TV.