The Thompsons reluctantly welcome new son-in-law Cuckoo into their home, but his New Age philosophy soon pushes patriarch Ken to the limit.
Ken's attempt to lay down some ground rules for Cuckoo at a family meeting has a devastating effect on daughter Rachel's homecoming party.
Ken is thrilled to be chosen for a political position, but Dylan derails his plans. Given his interest in politics, Cuckoo has plenty of advice.
Ken fears that Cuckoo will ruin his father-in-law's birthday celebration, but a cat's intervention turns Cuckoo into a hero and Ken into a villain.
Cuckoo convinces Lorna's best friend to make some huge life changes, including the pursuit of a career as a singer. One small problem: She can't sing.
When Cuckoo and Rachel realize that their marriage wasn't legal, a new ceremony is planned, but Ken plots to get rid of his son-in-law for good.
Ken looks forward to some time to himself when Dylan leaves for university, but a stranger with an all-too-familiar nature shows up at his door.
Dylan throws a party, hoping it leads to sex with his girlfriend. Dale takes over Cuckoo's potato van and provides some sketchy food.
Steve threatens to reveal sensitive information if Ken doesn't represent him in a malpractice case. Ben sets up Dale with Rachel's friend Natalie.
Ken takes Dale and Dylan to his old professor's funeral, determined to retrieve a book the man had borrowed. All three manage to cause a ruckus.
Ken is up for a big promotion at work, but when he tries to discredit a colleague who's also being considered, he stumbles on some odd video footage.
Ken feels emasculated when Dale has to intervene in warding off an intruder. Rachel has conflicting feelings about moving in with Ben.
As Christmas approaches, Lorna reveals surprising news while Ben and Dale do what they can to make the holiday special for Rachel.
Past her due date, Lorna proposes a baby care idea that Ken only pretends to support. Rachel's romantic hopes are dashed when Dale returns from China.
Dale and Ken help Rachel when she applies too late for her dream job at Nina's nonprofit, although their definition of "help" is not strictly legal.
Ken rejects Lorna's fears that a rival new mother has her eyes on him, but a bizarre series of events prove Lorna's concerns to be well founded.
Lorna forgets Ken's birthday, which is disrupted by Steve bearing a cask of home brew and a board game that conjures up Dale's memories of China.
When a jilted Dylan wants to drop out of university three weeks in, Ken and Dale take a road trip to campus on a mission to make him change his mind.
Dale prepares a very special contribution to baby Sid's naming-day ceremony, while Ken's mom visits from Spain and creates havoc with her tarot cards.
Ken conceals his secret agenda during the family's relaxing holiday in Cumbria, where the truth also catches up to Dale in more ways than one.
Ken is thrilled to be nominated for Lawyer of the Year until he learns that his workplace rival Jane has also made the list. Dale starts a job search.
Ken's awards ceremony speech has consequences, Dale and Steve try to get a business license, and Sid gets into a top nursery -- with one condition.
After calling the police on his loud-partying new neighbor, Ken befriends him and keeps the phone call a secret, allowing suspicion to fall on Steve.
Ken gets walled in during construction at the new bar, Rachel thinks she might be pregnant, and Dylan hooks up with someone new, yet not so new at all.
Rachel asks for some space so Dale strands her in the mountains, forcing Ken to search for her on the same day a meeting will decide his fate at work.
Ken plots to get his position back at the firm, Steve and Dale prepare for the launch of their bar, and Rachel contemplates a job offer in Africa.
A shocked Ken learns he has a billionaire half-sister he never knew named Ivy, but she's concealing a secret agenda when she arrives for a visit.
Ken reluctantly recruits Ivy as Sid's new nanny when a case of mistaken identity leaves him without child care. Rachel meets Ben's new girlfriend.
Ken and Lorna spice up their love life with some estate agent role-playing. Ivy partners with Dylan on his secret enterprise: a marijuana farm.
Ken considers a run for Parliament after a fortuneteller in the pub predicts victory. Ivy makes a run of her own at an aging multimillionaire.
Steve throws a divorce party for Ivy and urges her to vent her rage. Ken's snazzy new suit becomes a bone of contention between him and Lorna.
Ivy's unfortunate misuse of a common phrase leads to an untimely death. Ken begrudgingly hosts Lorna's ex-boyfriend at a fundraising dinner.
A campaign mishap with a live microphone jeopardizes Ken's election prospects. Ivy's ex-husband suddenly reappears and tries to get her back.