Matthew bans TV from the house - until Mo tricks him into renting an educational cable channel. Sweep watches it all night and appears to be a genius. He agrees to a Mastermind contest with Scampi. Sweep answers all the impossibly difficult questions correctly until Matthew tricks him and Scampi wins, as all his answers are "pass". Matthew discovers a piece of cotton wool in Sweep's ear that was keeping all the knowledge in his brain! All returns to normal when the cotton wool is removed.