Beware of Pandora's Box! ...As you may or may not know, "Pandora's Box" was a mythical container. Once it was opened, this box would unleash all the evil in the world. And now it's back, in 'Big Brother' form.

[Spoiler alert.]

On the latest episode of the show (Sun., 8PM ET on CBS), Matt gets a super-special "Diamond Power of Veto." But this veto might have a potential dark side. Uh-oh.

As it turns out, the new "Diamond Veto" comes with a curse. The curse involves the return of the dreaded "Saboteur." But since the previous Saboteur was Annie -- the first girl who was kicked off the show -- this means that we're going to need a replacement.

Ragan is offered the position. If he chooses, he can become the next Saboteur. Will he accept the offer of $20,000, and then turn against the other contestants?

Will Ragan do the right thing or the wrong thing? And could Matt's mistake lead to much more trouble for the rest of the household?