The Saturday task is physical/intellectual.

The prize fund stands at £71,500, but today's challenge could cost them up to £15,000, though one housemate could gamble and save the lot.

The gang choose one housemate to be a 'selector'. The others will be grouped in three pairs which will be determined by the selector picking names out of a bowl of fish guts.
For each couple, one housemate will take part in an intellectual task and the other in a physical task.

In pairs, the housemates taking part in the physical task have to stand on the first step of the stairs Big Brother has erected in the garden, while the 'intellectual' partner will be required to go to the diary room.

Each step represents cash, from £1,000 increasing to £5,000. The 'intelligent' housemate will have two minutes in the diary room to answer as many general knowledge questions correctly as they can.

For each correct question the housemate on the stairs will take a step up, get a question wrong and the steps go flat, plummeting the housemate into a pool of fish guts.

When time is up, the value of the step the housemate is standing on will be the amount they will save from the prize fund. Big Brother will not reveal how much has been saved, but will offer the selector the opportunity to win back all the money the group has lost in the challenge.

If they choose to gamble they must answer one general knowledge question. If they answer incorrectly the full £15,000 will deducted from the prize fund, but if they answer correctly the prize fund will remain at £71,500.