When the family arrives back from a trip to Pakistan with Mr Khan's mother-in-law in tow, Mr Khan is lumbered with looking after her. Then a miracle happens - she announces she wants to move into a home. When Sam - the head of a local care centre - arrives, Mr Khan is over-the-moon. That is, until he discovers the mother-in-law may be worth some money. With the help of son-in-law-to-be Amjad, a ridiculous disguise and a spying mission, Mr Khan tries to stop Naani moving out at all costs.
The day of the wedding of Mr Khan's daughter Shazia to 'pakora short of a picnic' Amjad has finally arrived, but all is not well in the Khan household. Mrs Khan is still upset that Shazia has opted for a British-Asian fusion affair, rather than a big, fat, traditional Pakistani wedding. Then, Shazia won't let her help with the organization and when Shazia refuses to wear a matriarchal family heirloom, it all gets too much - Mrs Khan refuses to go to the wedding, and instead takes a shift at the supermarket. So, with Amjad in tow, it's up to Mr Khan to get his wife back onside. But, of course, in Mr Khan's world things aren't that simple. As a result, Amjad goes missing, Shazia's mother-in-law-to-be Mrs Malik makes a startling revelation, and thanks to Mr Khan there's a very near miss at the ceremony.
It's Christmas Eve, 10 months after Shazia and Amjad's wedding. Mr Khan is feeling extremely festive - he's even got a new Christmas suit. And what's more, this year he's been given the honour of placing the star on top of the Sparkhill interfaith Christmas tree. But when the whole family gathers at the Khan house to head out to the ceremony, it turns out that Shazia has other plans. A frantic chain of events is set in motion, in what can only be described as the Greatest Pakistani Christmas Story Ever Told. This episode features guest appearances from Robert Wilfort, Neil Edmond, Eric Potts and Dev Sagoo.
Mr Khan gets into a state at a stately home when Naani takes the law into her own hands. The Khans decide to have a family day out to visit Farley Manor, owned by Lord Anstruther, which is putting on a display of Indian treasures collected during the British Raj. Mr Khan's efforts to impress the council committee are put on hold while he takes Naani around the old manor. He becomes much keener on all things ancient and Indian after meeting Lord Anstruther, but his hopes of hobnobbing with the aristocracy are jeopardised by Naani's sticky fingers.
Mr Khan bites off more than he can chew when he takes on a new role as a lollipop man, and a family photo opportunity causes friction between sisters Alia and Shazia. Mr Khan wants to get baby Mohammad enrolled at a good school and tries to take the inside track by becoming a school crossing patrol officer. However, the training regime and selection process is tougher than he was expecting - even with Amjad helping him to get fit around the streets of Birmingham. Meanwhile, Naani wants the family to have a proper family photo done in a studio. Shazia and Alia clash when Alia tries to hijack the studio session to get photos for her personal fashion vlog (which already has thousands of followers - most of them drawn to a video of Mr Khan walking to the bathroom in his underpants).
Baby Mohammad is having a few unsettled nights, and Shazia and Amjad are finding it difficult to cope with the lack of sleep. Mrs Khan thinks they need to spend some quality time together, and deputises Mr Khan to book them a romantic weekend away. Mr Khan is trying to win a Pride of Birmingham award (Alia misinterprets this as him going on a Birmingham Pride march), which leads to an altercation with a parking attendant at the supermarket. The dispute escalates and Khan finds himself staging a protest against parking fines from inside his car (after the attendant tries to have it towed away). The police are called - in the shape of community support officer Amjad - and Khan is able to solve Amjad's problems and his own in one fell swoop. Alia, meanwhile, has managed to get herself and baby Mohammad on a TV show, much to the family's embarrassment...
Mrs Khan decides she and Mr Khan should have more 'together' time, and invites Khan along to watch her tango class demonstration. Mr Khan already has something planned - he's opening a fried chicken franchise on the high street. He is keeping it a secret from Mrs Khan as he has invested their pension money in it. He enlists Alia, Amjad, Naani and nephew Faraz as his chicken shop crack team. Matters are further complicated when the manageress at the chicken shop, Sandra, takes a shine to Amjad. But for Mr Khan this could be just what he needs...
While trying to teach Baby Mo how to play cricket, Mr Khan discovers that his little grandson might be psychic and immediately sets him to work picking his lottery numbers. Amjad's mother, Mrs Malik, is threatening to solve Shazia and Amjad's housing problems by taking them with her to live in Bradford. Mrs Khan succumbs to stomach pains as a result of the stress, and the family rushes her to hospital. On her hospital gurney, while waiting to see a doctor (who she tries to set up with Alia), Mrs Khan makes her husband promise to stop Shazia, Amjad and Baby Mo going to live with the in-laws. Khan has to use his ingenuity - and a DNA testing kit - to try and save the day, not before electrocuting himself on a defibrillator and getting involved in one mo' mix up...
In line with the great tradition of British Muslim baking, Mr Khan enters the Great Sparkhill Bake Off. He's making his own version of the lemon drizzle inside-out cake. Meanwhile, there are more pressing problems on the domestic front: Alia's got a boyfriend. Mrs Khan is worried that he sounds too rough and sends Mr Khan (and son-in-law Amjad) to give him a talking to - at a pub. After negotiating a number of bearded biker men, Khan meets the boyfriend and for purely selfish reasons invites him over to the house. However, Mrs Khan makes a discovery that forces Mr Khan to quiz Alia about every father's worst nightmare...
Snowmen, reindeers and an actual donkey, it must be Christmas in the Khan household. Mr Khan embraces Christmas like never before, even launching his own range of traditional halal mince pies with the help of a local business dragon. Shazia and Amjad try to find somewhere else to live, because their landlord is selling their house and they can't afford the deposit to buy it. Naani has a solution - she's going to give them the money for the deposit. Her only mistake is entrusting it to Mr Khan, who promptly loses it. To retrieve it, he heads to the Community Centre's Winter Wonderland, where Dave's putting on a show about a talking snowman that may or may not be able to fly. Mr Khan finds himself re-creating an iconic festive scene. The story ends with a tearjerker as Mr Khan suffers a very personal loss.
The opening episode of the 5th season sees Mr Khan make an exhibition of himself in front of a packed house at Edgbaston Cricket Ground. Having been made to sleep in the car by Mrs Khan after forgetting their wedding anniversary, Mr Khan is on a mission to make amends. But his boast to Dave that he knows local boy Moeen Ali backfires when Amjad suggests he could get the famous England all-rounder to make a celebrity appearance at the fundraiser that Mrs Khan and Shazia are helping organise. Mr Khan has no option but to get to the cricket match to find Moeen and do whatever it takes.
Mr Khan has bought a drone camera to keep an eye on the local neighbourhood as he believes it is starting to go a bit downhill. This is brought home when he finds out that his grandson, Mo, is being bullied at his nursery. But when Mr Khan decides to teach Amjad how to be a better dad, he gets a lot more than he bargained for, both during a trip to the local pool and when re-enacting a scene from Birmingham gangster drama Peaky Blinders. Meanwhile, Shazia and Amjad get ready to go on their first family holiday together, except Mrs Khan thinks she is going along too. How is Shazia going to tell her that this won't be her first holiday since Great Yarmouth 1988?
Tragedy strikes the Khan household, as Amjad's bewigged father, Mr Malik, is knocked down and killed by the number 37 bus. The real tragedy for Mr Khan is that the grief-stricken Mrs Malik is staying with them and comfort eating him out of house and home. But when Mr Khan discovers he might be able to find an investor for his new invention amongst the funeral mourners, he throws himself into the burial arrangements.
Mr Khan has been spending quality time with Alia's 'friend who is a boy', Scab. They are getting on famously and, after a one-to-one chat with Alia, Mr Khan suspects it won't be long before there is another Khan family wedding on the horizon. But then Scab takes fright at the prospect of the Khans meeting his parents. The Khans believe it is because they are a bit snooty and object to the idea of having a Pakistani daughter-in-law. So Mr Khan and Amjad hotfoot it to the posh country club to confront Scab's father (played by comedy royalty, Harry Enfield) and give him a piece of their minds in a sweaty sauna.
Mr Khan has to drop his daughter Alia off for her first day at university - in Scotland. Mrs Khan wants the whole family to come, so Mr Khan has to find a way to get the whole lot of them from Sparkhill to Glasgow. When the car breaks down, he is forced to improvise alternative travel arrangements, which gives them all plenty of time to reminisce about Alia's early years.
Mr Khan and Mosque manager Dave organise rival Muslim Days at the community centre. Mr Khan is convinced his fun day with a bouncy Mosque and 'pin the beard on the Imam' stall will be far more popular than Dave's Women in Islam event. But he forgets that he'd agreed to look after his wayward niece Shabana. Mr Khan is forced to take the stroppy teenager to Muslim Day with him and, to top it all off, Dave has managed to invite Baroness Sayeeda Warsi, whom Khan is desperate to impress.
Mr. Khan tips his hat to Frank Capra’s Christmas classic It’s A Wonderful Life, with Sparkhill taking the place of Bedford Falls and Mr. Khan, like George Bailey, facing up to the fact that his life hasn’t turned out the way he planned it. But an encounter with a mysterious heavenly passer-by shows him how things might have been different and convinces him that, despite all its frustrations, his is a “Khanderful Life” after all. Mr Khan narrates as we go back in time to the The Khan's early years.