Robin has an epiphany that has a far-reaching impact on the rest of the ghosts, who each struggle to believe his prediction. Alison suggests a spontaneous night out with Mike, just like the old days! They try to get the old gang together but with such short notice, only Obi and his new girlfriend Brenda are free. Despite Alison's efforts to plan the best night ever, the evening doesn't quite meet her expectations, and the couple are left pondering how much their lives are changing.

It's coming up to Christmas, and Mike's mum is staying. Betty wants to be helpful, but it isn't long before she is driving Mike and Alison round the bend. Betty has overstayed her welcome, but Alison and Mike don't quite have the heart to tell her. Just as she decides to leave of her own volition, Betty suspects something is terribly wrong at Button House. She adopts extreme measures to make the house safe and in doing so endangers the resident Ghosts – will they come out of this unscathed?