The housemates went stark raving rat.
Big Brother transformed the housemates into rats for another silly shopping task, and unlike last week's politics task, it began and ended in one episode.
So, how well did they do? Let's recap.
The housemates woke up to find the house transformed into a laboratory, with Heads of House Ali and Dean as scientists and Hanah and Lily as their assistants. Everyone else had to dress up as rats and get in cages in pairs.
Although Hanah wasn't really talking to Ali over the nomination swap, she put that on pause to get on with the task, even though they had the easy part. All the scientists had to do was predict how the rats would act in three experiments.
The first task had to see the rats perform "under pressure", which meant receiving electric shocks. Sarah particularly did not enjoy the task, and she made it clear with some over-the-top theatrics. But once she finished the task, she celebrated by twerking while doing a handstand.
Although it might have seemed like she was jokingly annoyed, she admitted in the Diary Room that: "I'm just a bit done now. I'm fed up now. If it were up to me I'd just give up and stop, but I'm a team player. I've hit my limit."
She was spared the next challenge, where pairs of rats were brought into a room with tasty treats on offer. If they caved and tucked into the food, they'd risk failure.
The scientists predicted that the rats would prove to be team players and that Martha would prove that women have better intuition than men in the third challenge.
Gathered around the sofas, Big Brother told the housemates the scientists had incorrectly predicted the first outcome but were correct for the others. On the whole, that meant that they had passed the shopping task and received a luxury budget.
That instantly put the house in a good mood, but how long will that last?
Big Brother airs on ITV2 and ITVX from Sundays through Fridays, followed each night by Big Brother: Late & Live.
