When Jimmy loses at the weekly pub quiz for the millionth time he decides he needs a secret weapon. He turns to the cleverest person he knows ... but Alex is too young to go to the pub so he asks Diana instead.

Jimmy and Diana win, but only after Diana browbeats Bobby into conceding her a point for a disputed answer. When Diana gets home she discovers the answer she gave was wrong and insists on returning the prize money despite Jimmy's objections.

Next day, Diana goes to the pub to return the money to Siobhan's winning team. Siobhan awkwardly offers Diana a drink, Diana grudgingly accepts. Jimmy returns home to discover his ex-mother-in-law and girlfriend cackling over a bottle of wine. While Jimmy would love everyone to get along, this has crossed the line!