It's Christmas 2039. Ben looks like an octogenarian but Susan, thanks to moisturisers, still looks middle-aged. Janey has ballooned, Mikey has lost all his hair and is resorting to an ill-fitting wig and Roger, thanks to an accident at the zoo, is just a head in a glass case. Kenzo is late in arriving, giving the family time to look back on some of their worst Christmas days ever, though the worst one of all time, as Kenzo reminds them, was when Uncle Richard came to stay.