A site with a river running through it would put most people off. But not Harlem and Nicola who attempt to build a glass-house on a bridge over the water.
The top eight compete for a place in the grand finale. Four will go through and four will go home; Guy Sebastian and Daryl Braithwaite perform their new singles.
Big Brother’s mind games test the housemates’ resolve, while the nomination challenge puts loyalties to the test. Big Brother is hosted by Sonia Kruger.