Susan is looking forward to the birth of her first grandchild, but not to being a grandmother. Meanwhile, Nick wants to move back in and a new arrival at Ben's surgery has quite an impact.

Susan decides that she and Ben should take dance lessons, but they soon find it takes more than two to tango. Meanwhile, Michael decides to concentrate on his studies, but can he stop thinking about girls?

Normally, nobody in the Harper family would willingly set foot in Nick's flat, but when Susan's mother comes to stay, it suddenly seems more attractive.

When the local newspaper accidentally lists Ben in the obituaries, he takes it as an opportunity to do absolutely nothing. Meanwhile, Susan wants to convert Nick's old room to a nursery, but Nick isn't having any of it.

After the Harpers' marriage is threatened by Susan's discovery that the love poem Ben wrote to woo her was not an original, he goes to great lengths to make it up to her.

Janey's baby is due and Susan insists on traveling to Manchester for the birth; it's a journey that throws up several blasts from the past.

Susan gets hysterical blindness after seeing Michael in bed with a girl. Meanwhile, Ben is on dreaded jury duty and is hassled by an annoying busybody fellow juror, and Nick becomes a wrapping artist.

Susan decides to enter enthusiastically into the spirit of trick or treat for the neighbourhood children, which Ben tries to ignore until the spirits get to him.

Susan decides that Ben should spend more time with Michael in case he turns into another Nick, and Janey leaves the grandparents to babysit Kenzo.

Ben and Susan have to go back to school for parenting classes as a result of Michael playing truant.

The Harpers get a free holiday to Lanzarote, and even though Ben loses his luggage, he is happy enough to use his brand new digital camera as much as possible.

Abi's father asks Ben to be his best man; this turns out to have been a bad move, as he hands over the running of the bachelor night to Nick.

After coming into contact with an infectious disease from Peru, the whole Harper household is placed under quarantine by Susan. How long will it be till they all drive each other mad?