It's Carol and Trevor's 40th wedding anniversary. Joyce has organised a celebratory lunch at an upmarket gastropub. Her carefully-laid plans are thrown when Maureen turns up with her mum Joan, who, like Dr Jekyll, is very nice until she's had a drink.

Then Carol announces she's made a decision that could ruin not just this anniversary but every one to come - unless Joyce and Maureen can change her mind in time.

Joyce is retiring. Although she was hoping for a big party at a country hotel, Alan has just invited their friends round to their house - but at least he has blown up some balloons.

Maureen is feeling trapped 'out in the sticks' and latches on to Joyce's hip new neighbours - a young couple and their two kids - who have just moved from London. John's made a 'tribute video' for Joyce's party, but has forgotten to ask Trevor for his tribute. Alan has some bad news for Joyce that might spoil her party. That is, unless she spoils it first by confronting their neighbour about her kids' bad behaviour...