It is December 2039, and the Harpers are gathering together to celebrate Christmas. With a 'greed gift exchange', a rival cousin and a Nativity play battle, there may not be too much room for peace and goodwill.

Kenzo's school project about the family gives everyone a chance to look at some of the crazier moments in the Harper history.

Ben's old friendship with a celebrity dentist causes problems, while Susan finds a new friendship at an Albanian airport.

An undercover assessor for Cavitex, posing as a patient, leads to Ben having to attend a retraining course.

Susan decides to get another dog but, as ever, it is Ben who ends up in the doghouse.

Ben's uncle dies, but his inheritance may not live up to expectations.

When Ben and Susan discover that Michael is seeing a therapist, they decide to try a bit of analysis themselves.

Susan asks Ben to help an old girlfriend of hers through a divorce, but nearly precipitates her own.

Janey wants to keep her new man under wraps, while a suspicious Ben tries to expose an affair between Susan and a client.

Ben joins the young Harpers for a pub quiz, which leads to some awkward questions being asked.