David hires Donna, his lodger and the daughter of his best friend. While showing her round the office he discovers a doctored pornographic image of himself. Gareth, due to his covert operations skills, is told to catch the culprit.

It is Tim's 30th birthday - he receives a card from Dawn and an unusual inflatable gift from Lee. More importantly, however, it's Quiz Night and there are reputations to be made or lost.