CBS is set to launch Big Brother Season 28 on July 9, and the new season arrives with 14 new houseguests, more names still to be revealed on air, and Julie Chen Moonves back as host. For viewers asking what time does Big Brother come on tonight, the answer turns on the premiere itself and the rollout that follows: the show will air Wednesday nights at 8 p.m. ET after opening night, with hour-long Thursday episodes built around live evictions and Sunday broadcasts at 8 p.m. ET.
The timing matters because this is not a one-night return. It is the start of nearly 90 days of nominations, veto competitions and eviction votes, with most of the season available through 24-hour live feeds and a milestone 1,000th original episode built into the run. CBS says that 1,000th broadcast makes Big Brother the first primetime series to reach that mark, a rare piece of TV history hanging over a game that still depends on who can keep calm when the feeds are rolling.
That scale helps explain why the search for the premiere time is so active tonight. Rick Devens is also part of the season’s wider TV conversation, taking a break from Fiji to play in CBS’s other competition show, while the cast includes an MMA fighter, a rocket scientist, a game show host, a vineyard executive, a daughter of an ’80s pop star, a Survivor favorite and a RuPaul's Drag Race All-Star. CBS is not treating the reveal as a standard cast drop, either. It says more houseguests will be announced, which means the lineup viewers think they know is not the full board.
The season’s theme, Time Trip, gives CBS a way to frame that uncertainty. The network says the houseguests will move through rooms, relics and competitions that carry them across moments in time, drawing on the ’80s and Y2K and adding themed twists that will start shaking up the game from the opening hours. That sets up a season where the biggest advantage may belong to the players who can adapt fastest, not the ones who arrive with the most polished plan.
So the immediate answer is simple: Big Brother premieres on July 9, then settles into Wednesday, Thursday and Sunday nights on CBS, with live feeds and live-eviction episodes filling out the rest of the week. The bigger question is the one CBS has left open on purpose — which surprise houseguests join the game when the premiere begins.
