The ex Celebrity Big Brother 2017 housemates will return to the house this week.
The former housemates who have left this year's series - excluding the walker - will return on Wednesday to 'take over' the house.
CBB host Emma Willis teased on Bit On The Side: "They'll hijack the house they'll takeover the Diary room, they'll takeover the tasks."
In the evening, there will be a party for all the housemates where a shock backdoor eviction will take place.
The party will end when the evicted housemates leave the house (again) and they'll take one of the current seven housemates with them.
It was Sandi Bogle and Helen Lederer who were evicted from Celebrity Big Brother 2017 in tonight's double eviction.
They had faced the axe alongside Sarah Harding, Chad Johnson, Jemma Lucy and Sam Thompson in the latest live show.
The double exit leaves seven in the house right now: Sarah, Chad, Jemma, Sam, Amelia Lily, Derek Acorah and Shaun Williamson.
Lines to vote for the winner opened this evening following the double eviction results.
The lines will freeze on Wednesday at 7PM after which the one housemate with the fewest votes will be evicted at the end of the party.
Their exit will play out in Thursday night's show after which lines will then re-open.
The backdoor exit will leave a total of six housemates in the live final on Friday where lines will close for good and the winner will be crowned.
This year the Celebrity Big Brother champion will win a £50,000 prize for a charity of their choosing.
Celebrity Big Brother 2017 continues nightly on Channel 5.
The eviction results will air in Thursday's show.
The final will air on Friday night live from 9PM.