Julie Chen Moonves hosts the 25th anniversary edition, following a murder mystery theme at Hotel Mystère. Here's how to watch Big Brother USA 2025 from anywhere.

The “Big Brother” 27 live feeds won’t begin until Sunday, July 13, at 12:30 a.m. ET, which is three full days after the premiere. It’s likely that the feeds are being delayed to preserve the mystery houseguest’s identity, which suggests that we won’t know who they are until the July 13 episode of “Big Brother.”

Season 27 premieres with a 90-minute episode Thursday, July 10, from 8:00-9:30 p.m. ET. In addition to hour-long episodes Sundays and Thursdays, "Big Brother" will also have 90-minute episodes on Wednesdays, airing from 8-9:30 p.m. ET.

Not even The Masked Singer fandom is that good at figuring out identities that quickly, so props to the Big Brother fans who figured all of this out with so little information in less than a day. CBS may want to uses masks next time.