Musician Pete Bennett is the runaway favourite to win Big Brother as the Channel 4 show enters its final week.
Pete has Tourette Syndrome and frequently swears as a result
Wannabe footballer's wife Nikki Grahame, who was voted back into the house four weeks after being evicted, is second favourite, bookmakers say.
Ladbrokes has Pete at 1/6 to win with Nikki at 6/1, while William Hill is offering similar odds on the pair.
Former Miss Wales Imogen Thomas became the latest contestant to be evicted, receiving 62% of this week's votes.
The 23-year-old was nominated for eviction alongside Canadian waiter Richard Newman.
The pair had been living in the separate extension next door during the week.
They were joined by Nikki, plus Grace Adams-Short, Mikey Dalton and Lea Walker, the four former housemates who were in line to return to the main house in the show's latest twist.
Nikki was chosen by the remaining housemates as the person they would like to welcome back.
She is now once again in the running to receive the £100,000 prize handed out to the winner this Friday.
Lifeguard Glyn Wise is third favourite to be named Big Brother champion, with odds of 8/1 with Ladbrokes and 7/1 at William Hill.
Aisleyne Horgan-Wallace and Jennie Corner are 20/1 at Ladbrokes, and Richard is listed as 66/1 to win.
Imogen said she was happy to leave as she missed her parents
William Hill has Aisleyne at 20/1, Jennie on 33/1 and Richard in last place at 50/1.
Nikki let out a long, piercing scream when Big Brother told her she had been selected.
Pete said he had missed her and that it had been "horrible" without her.
But the decision to allow a former housemate to return to the competition is being formally investigated by Icstis, the watchdog which oversees premium rate telephone lines in the UK.
Some 2,700 viewers have lodged complaints, with many arguing they had already paid to vote for the housemates to leave for good.
In her post-eviction interview with presenter Davina McCall, Imogen said her best friend in the house had been Glyn, "because of the Welsh connection".
"He was like a brother to me, and I was like a sister to him," she said.
She also denied being upset about leaving the show before its final week, saying: "I miss my parents so much."