Tonight's Big Brother 2013 is set to reveal a big secret, but just what exactly is going down?
Bosses have yet to confirm exactly what's planned for tonight, but rumour has it that one of the nominees will be given a reprieve by their fellow housemates and be saved from eviction.
With voting lines not yet open for Friday's eviction, it's seemingly clear that at least something will happen to change just who's up for eviction.
But could there be more? Last night Big Brother teased a big "secret" would be revealed, and narrator Marcus Bentley added today on Twitter: "Tonight's secret is MASSIVE! Don't be fooled by rumour that housemates are saving a nominee from eviction they aren't. The secret is BIGGER!"
Perhaps Wolfy really is an actor after all, or maybe the secret bedroom will finally come into use?
It's fair to say that whatever BB has planned, the housemates have been completely left in the dark.
The group are expecting another live show tonight with Emma Willis announcing which one of them has been saved from the vote, although none of them seem to be able to call it.
Speaking to Hazel this evening, Dexter admitted: "It's hard to say, if they save Wolfy, Dan will get the gay vote and it'll be down to me and Gina, it'll be down to who's been more entertaining the this week and who they [the public] think deserves to stay."
See what Big Brother has in store from 10PM tonight on Channel 5.