It's Christmas Day. Mum has made a fantastic Christmas dinner. The boys are delighted that Grandma is coming round, but horrified that Dad's mother - 'Horrible Grandma' - is coming too.

There's a mouse in the kitchen, Mum's hiding in the shed, Dad's in charge of the cooking, and Jim is delighted when he ends up invited to have dinner with the family.

Jonny's in a pickle: he wants to split up with his 43-year-old girlfriend/boss, but he's too scared. Grandma offers him some advice, and some dancing lessons in the kitchen.

Jim has made a cake to celebrate his dog Wilson's birthday, while the family return from a spin in Jonny's new but uncool company car to find something awful has happened to the house.

To get out of cleaning the loft with Dad and Adam, Jonny claims to have dislocated his shoulder. But when Adam discovers he's lying, he threatens to tell mum immediately.

The boys are excited, because Grandma (Frances Cuka) is coming for dinner, and she's bringing her new boyfriend. 'He's not her boyfriend,' says mum, he's her 'male companion'.

When Jonny finds out that Adam threw his beloved 'Pandy' toy in the bin when he was 11, Jonny swears revenge, threatening to destroy 'Buggy', Adam's old rabbit.