Dennis will stop at nothing to prevent Pieface from failing Mrs Creecher's maths test!
He persuades the gang to use Professor Von Screwtop's mind-swapping device. But in a disastrous turn of events, Screwtop is on the loose with the brain of Paul the potato and Pieface is left with a potato with the brain of Screwtop to help get him through the test!
Come back soon for mega exclusive video clips, cool episode trivia and more awesome content.
In the meantime, why not try this ace puzzle to see if you can guess what's going to happen!