[Marcus.]

The word 'secret' hasn't been far from the housemates' lips since Day 1, and since it transpired that Michael was a mole, speculation has been rife. The past couple of days, though, everyone seem to have calmed down, taking things at face value and trusting each other a little bit more. Well, that's no good, is it?

This afternoon, Big Brother will set housemates a task that will require them to share their honest, truthful opinions about each other, face to face, for the chance to unlock a literal box of secrets. Every opinion given will earn the housemates a key, to unlock one of three padlocks that locks the box.

The catch? The keys are hidden amongst 100 decoy keys. The more revelations the housemates make, the closer they will get to a video that will reveal a variety of secrets about their fellow housemates.

As we write, the housmeates are lined up behind their plinths, ready to let rip.

Will the housemates' opinions on each other cause ructions? Will they manage to unlock the box? What secrets will be revealed? Well, you'll have to check back to find out.