Mario has saved himself from eviction from the Big Brother house for the second week running after winning a memory task.
The housemate chose Sam Pepper to replace him in facing the public vote, alongside JJ, Dave and Jo.
Mario, JJ and Jo had been called to the diary room individually to listen to animal noises in a sequence. They then had to repeat the animal noises back to Big Brother. JJ remembered six and Jo recalled 11. But Mario emerged victorious after naming 22.
Dave was banned from taking part in the task after openly discussing nominations.
Earlier, the quartet were nominated for eviction after being doused with gunge by their housemates. Instead of simply naming who they wanted to be given the boot, each of the contestants was chosen by having a bucket of slop dropped on their heads.
Mario came off worst with four buckets - two of mud, one of gunk and another potion of soup and fish sauce - poured over him, while the others were given three, including custard, baked beans and spaghetti.
Josie and John James were the only housemates to survive the task without having any buckets chucked on their heads.
The housemates were forced to nominate in person - rather than in the diary room - as a punishment for discussing nominations. They had to approach their chosen two nominated housemates from behind and fling the buckets over their heads without discussing why they were nominating them.
Josie, John James and Dave had previously been banned from nominating Sam Pepper for breaking the rules when they implied they would nominate him this week.