This week, the Big Brother housemates all face Big Brother's self-improvement task, whereby everyone's placed up for eviction except those who achieve 'guru' status – and guess what Ziggy's only gone and achieved.

That's right – as things stand at the moment Ziggy is exempt from Friday's Big Brother eviction. That's a shame, because not only was Ziggy obviously going to be one of the favourites for Big Brother eviction thanks to his juddering, galactic smugness but his immunity means that we have to watch his stupid leathery face pull that irritating patronising expression – and listen to his idiot voice – for yet another week. Yeah, thanks a lot for that, Big Brother. If Gerry becomes immune to this week's eviction too, we're going to stud a baby's poo with anthrax and mail it to you.

But who's going to win Big Brother? Here's the second part of this week's Big Brother betting odds – for Tracey, Jonty and Gerry – with help from Paddy Power…

Tracey – For as long as we can remember, Tracey was the housemate least likely to win Big Brother, mostly thanks to her innate sense of solitude and the way she only has a stock of about three phrases at her disposal. But now Tracey is happily occupying the middle ground. Why's that? Well, there are two schools of thought here. One says that the ecstatic reaction Tracey received when she was put up for nomination two weeks ago has rubbed off on the Big Brother voters, who now think that she's a force to be reckoned with inside the Big Brother house – and the other says that she's now the fourth least-likely to win Big Brother solely because Carole's turned into an arsehole, Kara-Louise has turned out to an arsehole and Ziggy hasn't been evicted yet. For the life of us, we could never guess which one is true (the second one) Current Big Brother betting odds – 50/1

Jonty – A week ago we suggested that Jonty might win Big Brother, because the house was in dire need of a virgin bisexual spanker with a creepy fondness for teddy bears and an alarming habit of thinking his own farts are the funniest world. But even though Jonty has proven to be the classic Big Brother eccentric latecomer, he's let himself down over the last few days. Why? Because he's actually shown himself to be fairly intelligent and strategic by figuring out that the Big Brother halfway housemates should have acted more as a unit to preserve their authority in the Big Brother house. Well-reasoned gameplans? That's not what we want from Jonty. We want Jonty to giggle when he farts. Fart, baldy, fart! Current Big Brother betting odds – 40/1

Gerry – Now that Charley, Chanelle and Shanessa have all left the Big Brother house, there's a dearth of truly insufferable Big Brother housemates around. True, Ziggy is insufferable, but give him a mirror to preen into and he'll stop bothering you. No, we're talking about housemates who are so insufferable that you'd try and kick out the floor if you were trapped in a lift with them – so Gerry is highly valuable. Last week was a prime example. Ziggy let slip that he'd nominated Gerry for eviction and, instead of saying something along the lines of "OK, no hard feelings, nominations are a cornerstone of the Big Brother experience after all" Gerry launched into a wounded rant that lasted for three whole days and made us seriously consider going Waco on the Big Brother house just to shut him up. The scary thing is that we don't think that Gerry has even grasped why he's such a tosspot yet, either. Current Big Brother betting odds – 40/1

Tomorrow - Big Brother betting odds for Liam, Brian and Sam and Amanda. But if that's too long to wait – or you feel like making more money than you know what to do with – head right over to the Paddy Power Big Brother betting odds page to see the latest, and best, betting odds… and get a free £10 bet as well!