The final task in the two day lab-rat-athon was by far the darkest. Inspired by a famous experiment carried out in the 1970s by psychologist, Stanley Milgram, 'The Cruelty Experiment' aimed to test how much pain scientists Lydia, Benedict and Luke A would be willing to inflict in the name of obedience.

It's a twisty-turny one so gather round the scientists were told to ask Adam, Lauren and Adam general knowledge questions and to punish all wrong answers with shocks. The voltage was to increase with every question the lab rats got wrong. What the triumverate of boffins didn't realise was that in this task the tables had turned and they were the subjects of the experiment.

The lab rats had already been briefed on the real task by Big Brother. They were instructed to answer every question wrongly and to feign pain as the shocks increased. The goal of the task was to compel the scientists to choose humanity over blind obedience and stop the shocks before the max voltage of 1000 was applied.

Happily, due to some stellar fakery from the trio, the scientists called off the shocks by 800 volts.