[Marcus.]

If they thought being confined to the Big Brother House was bad, housemates are going to be shocked by today's task.

The celebs will be split into two teams, with Audley and James as team captains. To win a luxury dinner for their teammates, the captains will have to endure being trapped under a Perspex dome in the garden. And they won't be able to leave for any reason - even though Big Brother will try to tempt them out by offering them all sorts of goodies if they'll just come out...

Whoever cracks first will automatically be put up for eviction, and the losing team will also be made to wait on the winners at a posh dinner this evening. There's also a BIG bonus for the champion. Watch the clip to find out what it is and stay tuned for updates...

james could go up for eviction