Following the death of Mr Beamish, who owned the surgery above Ben's, Roger Bailey Jnr, the son of Ben's former mentor, tries to buy it, but Ben lies and tells him someone else has bought it, so Roger buys the surgery below instead. Meanwhile, Susan tries to make the house baby-friendly for Janey's yet-to-be-born baby, and then has problems with the plumbers. Nick becomes a film extra, Michael becomes obsessed with the Army cadets and Roger falls for Abi as soon as he sees her.

Susan tricks Ben into joining a modern Latin dance class, but Ben turns out the better dancer. They both then get Roger, who allegedly dances "like Fred Astaire", to teach them privately so they can enter a competition at the end of the month. Meanwhile, after getting a "B" in a maths test, Michael decides to stop thinking about girls so he can focus on his studies. Guest starring Jacey Sallés and Georgie Glen.

After Janey goes into labour while on the phone to Susan, she and Ben rush up to Manchester to be at her side. On the journey up there they recall Nick's birth, and when they get to St. Margaret's Hospital in Manchester, an unseen Janey has given birth to a baby boy, who is later named Kenzo.

First Episode: Kenzo Harper

Susan gets hysterical blindness after seeing Michael in bed with a girl called Fiona (Rachel Hyde-Harvey), and it will not go until Michael says nothing happened. Meanwhile, Ben is on jury duty and is hassled by a busybody fellow juror called Joanna Elton-Johns (Sylvestra Le Touzel), and Nick becomes a "wrapping artist" and wraps everything up in brown paper.

It's Halloween and Susan has turned the family home into a "house of horror" and dressed up as a witch, but Ben is much less enthusiastic. They are plagued by a group of children (Dani Harmer, Tony Bignell and Hannah Bridges) doing trick or treating, and strange things begin to happen. Also, Abi is dressed as a piece of cheese and Roger is a ghost (a white sheet, actually...)

Ben and Susan baby-sit Kenzo for Janey, but Susan becomes annoyed when she discovers that she is the only person who is unable to stop Kenzo from crying. Meanwhile, Michael wants Ben to read his Geography project but when Ben can't be bothered he agrees to do a UFO watch with Michael instead, and Nick is dating three girls at the same time.

Ben and Susan are forced to attend parenting classes by Michael's head teacher (Owen Brenman) after he plays truant from school, and Susan is told that she is too interventionist, so she tries to become laid back like Ben, but Michael actually misses the authority. Meanwhile, Roger tries to become more hard and tough so Abi will go out with him.

After Susan gets a free holiday for four, she, Ben, Nick and Michael all go to Lanzarote in Spain. However, Ben's luggage gets lost, and then all his credit cards and money are stolen and he is forced to beg to Nick for money. Ben also upsets the people in the next house (Henrieta Baines, Christopher Ryan and Cressida Whyte) by accidentally taking indecent photos with his new digital camera. Meanwhile, Michael spends most of his time out.

Abi's father, Ben's cousin, Richard Harper (Anthony Head) is getting married for a fifth time, to 18-year-old Gina Beresford and he asks Ben to be the best man, which means Ben has to organise the stag night. The wedding makes Abi annoyed, especially as Gina Beresford was at the same school as her. Meanwhile, when Michael refuses to do the washing-up, no one else does it, either.

Roger goes to the Harpers saying that one of his patients had got an infectious disease from Peru called "Ortiz River Fever", so Susan puts the whole house under quarantine. Michael stays upstairs with Fiona, while Nick tries to get in the house with a pregnant python called Pamela. Meanwhile, Ben manages to escape the house, meets a man called Clarence (Leslie Randall) and then has an epiphany where he does not exist. Guest starring Russ Abbot.

Ben, Susan, Nick and Michael are on the tube after doing some Christmas shopping, and due to signalling problems the train cannot move. Michael gets a girlfriend called Claire (Sydney Stevenson), Nick makes money by selling bottled water and Susan starts decorating the carriage. Abi, Roger, and an Albanian man (Samuel Gough) are busking as a Romanian folk band, while Nick brings Richard Whiteley to see Ben and Susan. However, when the problem is fixed, the driver (Nigel Lindsay) refuses to move on until Susan, who was rude to him, apologises. Meanwhile, Ben, dying for a drink, tries to steal the drunk man's booze whilst everyone in the carriage is asleep. Guest appearance by Robert Webb.