The will-they-won't-they tension reaches new highs in this epic series finale for Christmas that sees Lucy and Lee in previously uncharted emotional waters.

When Guy's daughter Chloe gets appendicitis, Lee and Tim are left looking after her son Dillon while Guy and Lucy visit her. While in their care, Dillon swallows a subbuteo football and Lee and Tim have problems locating it, and try to think of ways to get it out of his body. However, it later turns out Dillon did not swallow it after all. Lucy is worried about the age gap between her and Guy.

Social niceties are stretched to snapping point when Lee and Lucy take in a package for their neighbour and inadvertently discover that it contains an embarrassing object that Lee now has to return. That proves to be easier said than done.

When an old lady wanders into Lucy's flat and makes herself at home on the sofa, Lee doesn't know what to do with her.

After a night spent out clubbing, Tim returns to the flat wearing the wrong coat, and convinces Lee to help him return it to its owner.

Lucy persuades Lee to pretend to be gay after she lies to a business acquaintance Guy, who she was told is gay himself, by telling him she lives with a gay flatmate to prove she is not homophobic. However, Guy soon starts to get suspicious and tests Lee's sexuality by taking him to a gay bar. Later, Guy overhears Lee saying to Tim, who had started to think Lee was gay, that he is not gay. When Lucy then explains to Guy what happened, he reveals he is not gay and he and Lucy kiss.

Lee is shocked when Lucy announces that she is pregnant and he wonders if he could accidentally be the baby's father.

Lee wins a £1000 after winning an essay writing competition. A journalist shows up to interview Lee but expects him to be disabled after reading his story.

Lucy isn't happy with the noise a new neighbour is making. She asks both Lee and Tim to talk to him but both are scared too. Tim decides to take up boxing so that he will have more courage. Lee ends up going to confront the man.

Lee's past catches up with him when a young woman appears on his doorstep and asks for a cup of sugar.

Lucy and Tim are distraught. Their parents' 30 year marriage is at an end and their father has moved out of the family home - and into Lee's bedroom.

Lucy finds herself working on a Government initiative encouraging men to regularly check themselves for lumps. Eager to please Lucy, Lee follows the campaign's advice and discovers something he wasn't expecting.

In an attempt to impress Lucy with his intellectual prowess, Lee joins Daisy as a contestant on the TV quiz show Pointless.

No matter what happens, Lucy's surprise party for her parents' anniversary must remain a secret or it won't be a surprise. So why she tells Lee about it is anyone's guess.

Lee spends time in the bar with Toby worrying that the woman of his dreams is drifting further away.

Lee Mack, Sally Bretton and Katy Wix introduce a compilation of out-takes from across the various series.

After eight years of marriage, Lee and Lucy disagree over how to keep the romance alive.

Lucy causes offence by choosing the wrong babysitter.

Are Lee and Lucy ready for another child?

When Lee accidentally sends a rude text about Anna to Lucy, he makes the stupid mistake of sending it to Anna herself. Lee and Lucy now face the impossible task of stealing Anna's phone and deleting the text before she reads it.

When Lee and Lucy are asked to cover for Anna on more than one occasion, so that she can go out at night and have secret Italian lessons, they suspect the worst – that she is having an affair. Lee decides that it is up to him to tell Toby that his marriage is in jeopardy and sets about finding the evidence.

Lee dreams of a perfect life with Lucy, but can the reality ever match up?

Lee promises to stop treating Lucy's flat as if he owns it - but not before he has hired it out to a film director.

As Lucy and Guy's relationship intensifies, Lee starts to ponder his lack of a girlfriend and, encouraged by Barbara, tries speed dating. Tim is forced to go on a disastrous date with Barbara in order to prove that he sees her as more than 'the help'.

As a surprise for Lee's birthday, Lucy invites the whole family to join them in an escape room.