Big Brother 678

Big Brother 678 is a spin-off edition of Big Brother. It featured past contestants from series 6, 7, and 8 all moving back into the house for a second chance. It aired alongside Big Brother 9 in 2007.

Housemates
Eighteen housemates entered the house on Day 1, all of whom were past contestants who appeared on Big Brother 6, 7, and 8.

Entered after Day 1
Over the course of the programme, other past contestants entered the house: