Day 15 in the Big Brother House was coloured by one uber Lab Rat task which will continue into tomorrow. The housemates awoke with rumbling tummies but discovered, shock horror, no food in the House.

Big Brother had big plans for the HMs to claim back their nosh. The three most intelligent housemates were elected to play the role of 'scientist'. The other 12 housemates dressed up as rats. Adam had a special rat costume made out of rubber due to a latex allergy. The rats were subjected to a number of clever experiments plotted by the ever-crafty Big Brother task team.

Stage one, The Food Wheel, required the rats to tread the human-sized hamster wheel in the garden to earn cheese-based food rations. Girls were rewarded with tasty treats, while the boys were given disgusting meals. As with every task, there was a know-it-all who stepped in to assist. In this case, it was the very bendy Jersey girl Lauren, who was nominated for eviction yesterday.

Stage two, Eyes on the Prize, tested the housemates' concentration to the max. They wore high-tech eye-tracking glasses while they stared at their prize. Ashleigh, Shievonne, Scott and Luke S all did themselves proud by remaining focused in the face of serious distractions.

As Scott enjoyed a party-for-one in the Diary Room as his Eyes on the Prize reward, the rest of the rats were being prepped for stage three of the task. They had to obey the scientists' instructions coming to them through an earpiece but pretend to be hypnotised to Scott in order to test whether he would go along with it. He did. Oh Scott.

In non-task news, the lab rats become irritated throughout the day and gossip was rife, with Lydia taking centre stage. She was in cahoots with Luke A and Deana about alliances in advance of next week's nominations already!

As we draw stumps for tonight, Caroline is spending a night alone in the large task room listening to self-help phrases in preparation for tomorrow's Impossible Maze task. Talking of mazes, we're pretty lost. Let's hope that tomorrow brings more clairty for lab rats, scientists and humble viewers alike.