Molly meets a new stall owner, Alice, and shows her round the Big Hub. While Molly takes Alice for a drink in the Wobbly Coffee Pot, James and Mack bring Alice's boxes in to set up the stall, but James drops one of the boxes, smashing some of her pottery. Bob suggests making a mosaic out of the broken pieces, and he and the kids make a mosaic sign for Alice's stall.
Molly and her friends go litter-picking on the beach. Meanwhile, Moira has lost her precious whistle and no-one realises it's in Molly's bucket and about to get recycled.
Molly dresses up as a fairy godmother and makes Suki and Ruby's wishes come true when Daisy takes them to the see the pigs. But Magnus's wish to build a shiny robot doesn't go as smoothly.
Mack buys Daisy a puppy called Little Mo. Moira says no pets are allowed in the Big Hub, so Molly and Mack try to hide Little Mo, but then she escapes.
Alice has organised a relaxation class, and Molly helps get people to come to the class. But just as everyone starts to relax, Bob and Moira start some very noisy work.
Molly volunteers Mack to play the saxophone in a talent show. Mack discovers he can only play well when he is wearing a golden hat, but then something terrible happens to Mack's hat.
Mack tries to help Daisy by bringing Twinkle the pony to the vet's surgery. Twinkle escapes and ends up in the Big Hub - which doesn't please Moira at all.
Molly decides that Alice and James ought to get married. She arranges for them to go a date at her own homemade cinema, but then the projector breaks down.
When Bob mixes up a delivery of cakes with a delivery of fish, Mrs Juniper is forced to sell the fish. James and the kids help Mrs Juniper turn her cafe into a fish shop.
Molly decides to make a film with Alice to cheer her up, but all sorts of things go wrong and then Mack manages to erase the film completely. How can Molly save the day?
Just before the visit of a VIP, Mack accidently locks the adults in Moira's office and they can't escape. Luckily, Molly has an idea and the kids take over.
Mack tries to help Bob with a flower display, but Mrs Juniper thinks the flowers are hers. Mack can't bring himself to tell her the truth and ends up only adding to the confusion.
Bob tells Molly that the Queen is coming to visit. An excited Molly spreads the word, only to find out that this queen is actually a chicken. What is she going to tell everyone?
Alice asks Suki to read to the Kids Club, but Suki is shy and doesn't want to. Suki tries to hide Alice's reading glasses and get the reading cancelled but things don't go the way she imagined.
Mack borrows Alice's precious puppets to lend to the kids for their show, but somehow he loses the puppets and ends up with a bag of lost property.
Molly promises to return a missing doll to its owner, but how can she find out where the owner lives? James helps out, and they make a surprising discovery.
When Mack goes missing, Molly decides to become a great detective and with her sidekick Daisy she hunts the Big Hub for clues. Meanwhile, Mack is searching for Molly!
Mrs Juniper has an old cassette tape of her choir. When the kids accidentally unwind it to make a sculpture, Molly forms a choir to sing for Mrs Juniper while Bob fixes things.
Molly organises a sleepover at the Big Hub to raise money to fix the leaky roof, but when everyone gathers that night Magnus reveals he is scared of the dark.
Moira can't decide which stallholder should win Hubber of the Year. Everyone has a suggestion, but Molly provides the solution to Moira's problem.
Mack is attempting to tidy things up at his stall, but Molly has been distracted by a funny poetry book. Meanwhile, Moira brings two new arrivals to the Kids Club for the first time – her granddaughter Caitlin and Caitlin's best friend Euan. Everyone is very excited to meet them and they immediately set about building a cool spy den for all the children at the Kids Club. As Caitlin takes charge, people notice how like her Granny she is. However, Moira is offended that people think Caitlin is nosy and bossy like her! Can Molly the poet find a way to help the grown-ups make it up to Moira?
Mrs Juniper feels slighted when Moira raves about the fancy new cafe in town. Mrs Juniper decides to give the Wobbly Coffee Pot Cafe a makeover and ropes in Mack and Sandy to help. When Cafe Juniper opens its doors, Mrs J is delighted with the results, but the customers don't seem so keen. Bob feels underdressed in his allotment clothes, and James doesn't like the fancy coffee he is served. Bob takes his sandwiches to Moira's office instead, and James shows up to make a cup of his favourite, normal tea. Soon Moira's office is full, and Cafe Juniper is empty. Mack tries to tell Mrs Juniper that she's losing her customers, but she won't listen. When Mrs J nips into Moira's office, she quickly realises where everyone is and finds out that they all loved the Wobbly Coffee Pot Cafe just the way it was.
It's Christmas Eve, and Molly and her friends are writing their letters to Santa. They are super excited, but in their excitement, no one notices that Euan is very quiet. Euan eventually tells Molly that he hasn't posted his letter to Santa because he and his mum are homeless, so Santa won't know where he lives. Molly asks James what being homeless means, and he explains that Euan and his mum don't have a proper home at the moment, but that Santa will definitely still know where he lives. Meanwhile, Caitlin thinks that Moira has got her a real reindeer for Christmas and runs back to the Kids Club to tell her friends. When James asks Moira about this, she says that she's just getting a toy one. Moira scrambles to find a real reindeer to visit Caitlin, but she just can't find one. And on top of all this, Mrs Juniper is looking very tired. She tells Molly that she is hosting Christmas at home for all the stallholders - it's all a bit too much. Molly is determined that everyone should have the best Christmas ever. She convinces Euan to post his letter and asks Moira if they can all have Christmas together at the Big Hub in exchange for finding her a reindeer. Everyone works hard to get the Big Hub ready - they get food together so Mrs Juniper doesn't have to cook, Mack comes up with a solution to the reindeer problem, and Euan is happy that Santa did manage to find him after all. It really is the best Christmas ever.
James and Alice are officially in love. They want to tell Mrs Juniper first, so they ask Molly and Mack to keep it to themselves. It isn’t easy though, as good news travels fast!
Caitlin accidentally breaks one of her Granny Moira's walkie-talkies. Bob and Mack are roped in to help her fix it and put it back in Moira's office before she notices.
Bob's identical twin, Ted, comes to the Big Hub for a visit. When Molly finds out that they used to pretend to be one another as kids, she has an idea.
Mack wants his game day at the Big Hub to be a success. But no-one understands Magnus's favourite game, and Mrs Juniper and Moira get a bit competitive over Snakes and Ladders.
When Mack discovers a guitar that looks just like his mum's, Alice encourages him to start playing again. Meanwhile, Moira finds some roller boots and decides to give them a spin.
Caitlin doesn't want to admit that she's grown out of her favourite space dungarees. When Alice teaches Caitlin and James to samba dance, there are nearly disastrous results.
Bob smuggles his baby chicks into the Big Hub, despite Moira's 'No Pets' rule. But they are very noisy. Bob and Mack need to find a way to keep them quiet before Moira notices.
When Alice plays a silly prank on James, he starts plotting his revenge. As the jokes continue, Magnus decides to join in and play a joke on Suki - but things don't go to plan.
Suki is excited to get her first pet, but she can't decide what to choose. The Hubbers make lots of suggestions, until Suki makes her mind up about the perfect pet.
When Alice starts playing 'The Yes Game', everyone in the Big Hub joins in. Molly needs to ask Alice an important question, and soon she thinks of a clever way to find out the answer.
Bob is nominated for the Bridgetown Green Hero Award, but can't stand all the fuss. Ruby makes a wish at Bob's allotment, and Magnus tries his best to guess what it is.
Mack repairs Daisy's old toy dog as a surprise, and Molly can't wait for her reaction. But Molly's meddling causes Daisy and Mack to fall out, and it's down to her to fix things.
When Magnus brings in his old toys for the Kids Club, he and Euan decide to create a toy library. But it causes an upset as Euan and Caitlin have their eye on the same toy.
Mack gets a delivery of new toys for his stall that remind him of Molly. Alice wonders what it would be like to have a brother or sister.
Mrs Juniper's 'Grasshopper Pie' is the talk of the Hub, but Moira's not sure about it. Suki helps Daisy at the vets when there's an emergency with Mrs Anderson's dog, Bonnie.
Everyone is missing Molly, who's been off all week with chickenpox and is really fed up. They decide to sing a song to cheer her up, but can Mack write the perfect song for Molly?
Daisy and Suki look after the farm for Mrs Anderson. All is well, until cheeky Willow the goat escapes. Magnus and Molly are on a mission to celebrate Ruby's 'special day'.
Bob needs help translating a French instruction manual. Mrs Juniper reveals that she can speak French - it's her hidden talent. The Hubbers think about their own hidden talents.
Mrs Juniper trials a new smoothie with an extra special secret ingredient. Ruby is convinced she saw a sea monster at the beach with her dad. The gang decide to investigate.
James plans to propose to Alice, but Molly wants to make sure it's super special. The kids are exchanging 'happy notes', but an accidental mix-up causes a lot of confusion.
James and Alice try four different wedding cakes, but can't decide which one to choose. Molly suggests a game of 'weddings', but finds out that not everyone wants to get married.
Euan's plans with his mum fall through, so Molly organises a treasure hunt to cheer him up. Moira accidentally breaks the treasure and has to find a replacement - fast.
James and Molly see a hedgehog outside the Hub. Suki is worried, so they ask Daisy to help find Snuffles a new home. Meanwhile, Bob is dealing with a slug invasion at his allotment.
Molly helps Alice arrange a surprise for James, but he is planning the exact same gift for her. Molly goes on a mission to help deliver the gifts without ruining the surprise.
Moira is worried, as the Hub has been very quiet lately. Caitlin comes up with an unusual idea to attract customers and stop her granny from worrying.
Moira lets Suki keep her pet mouse, Otto, in her office for the day - as long as his cage stays closed. Moira breaks her own rule, and chaos ensues as Otto ends up loose in the Hub.
Euan and his mum have been offered a forever home, and they have to move in immediately. Caitlin worries that Euan won't feel at home right away, so she decides to make him a present.
James is reminded that it's his anniversary - five years since he opened the Kids Club. He and Alice look back on their memories, both good and not quite so good.
Alice gets an important phone call from her mum in Canada. Mrs Juniper and Moira are bickering, and Caitlin's cheeky 'chatterbox' message doesn't help matters.
Ruby is worried about the plastic pollution in the sea. It's making Swishy the mermaid and her friends sick. The Hubbers help her set up a protest, and Mack writes a special song.
Daisy introduces Molly to rescue dog Buddy, and Molly tries to find him a new home. Caitlin wants to know everyone's age, but it's a sensitive subject for some.
James is sad when he realises he's misplaced the scarf that Alice gave him. He really misses her. As the Hubbers share fond memories, they help him in his search.
Mrs Juniper is all aflutter when anonymous food blogger, The Mystery Muncher, decides to review the cafe. Will the visit be a success and earn her a five golden spoon rating?
Moira has so many jobs that need done. She sees Caitlin pretending to be her and it gives her an idea - Caitlin can be Mini Moira for the day and help around the Big Hub.
Molly is sad today, as everything reminds her of Alice. Ruby suggests they make a fairy bundle to help her feel better. Moira turns her nose up at Mrs Juniper's pesto.
Daisy wears a name bracelet which has her Nigerian middle name on it. Eilidh tells Daisy that she has a Nigerian middle name too. Suki helps Mack with a puzzle box.
Moira is on a mission to make the Hub more eco-friendly. Suki arrives at the Kids Club with a mysterious object.
Mack gets a delivery of toy medals, and presents one to Molly for generously giving her old jacket to Caitlin. This gets Molly thinking - who else deserves a medal at the Hub today?
Alice is back. But that's not the only surprise in store for James today. Mrs Juniper gets caught off guard by Moira's 'chair inspection day'.
James and Alice's wedding day is finally here, and the Hubbers can't wait to celebrate. Mack worries about his best man duties, especially when he misplaces his speech.
Molly is shocked when she hears this is Suki's last day at the Big Hub. She decides to organise a party and enlists the help of the Hubbers, including new stallholders Kez and Ayesha.
Magnus brings little brother Lennox to Kids Club for the first time and hopes he'll fit in. Molly advises him not to worry, but elsewhere her advice has unintended consequences.
Moira asks Kez and Mack to move an enormous pile of boxes, but Kez wants to have some fun first. Meanwhile, Caitlin's fairy-tale game doesn't work out quite as she planned.
When Molly sells Euan's robot by mistake, it's up to her and Mack to it track down. Unfortunately, her idea to find the robot causes widespread chaos and panic in the Big Hub.
Caitlin wants to make Daisy and Mack's anniversary perfect. When the other kids are roped in to help, the second first date doesn't go quite as Caitlin imagined.
When an online review calls Kez's stall messy, Moira goes into a panic. She calls an emergency inspection and shuts down Kez's stall. Can Molly get Moira to see sense?
The birds are eating Bob's berries at the allotment, and Mrs Juniper needs more for today's dessert. Ruby and Ayesha build a scarecrow to scare the birds, but it looks very familiar.
Caitlin invents a monster to avoid sharing her new den with the other kids, but Ayesha is suspicious. Meanwhile, Moira is determined to find out who's been eating her biscuits.
It's Mack's birthday, and James is planning a surprise at the Big Hub for him. However, it's been kept so secret that Mack thinks everyone's forgotten his special day.
Kez gives Bob a 'waste coat' from her new recycled fashion range. When he tries to dispose of it, Kez catches him in the act. Molly needs a plan to make Kez and Bob feel better.
It's an ordinary day at the Big Hub until Alice thinks her baby might be on its way. Molly and all the Hubbers pull together to help. Meanwhile, Mack has to find James - quick.
Everyone wants to know the name of Molly and Mack's new baby sister. Molly knows but can't tell. Caitlin decides to hold a 'guess the baby's name' competition.
Moira is in charge of the Wobbly Coffee Pot for a day. Magnus thinks they should keep the cafe just the way it is, but Moira wants to make big changes.
Lennox is helping at the Wobbly Coffee Pot and decides to make jungle animal sandwiches. After hearing tales of her travels, Ruby thinks of a way to bring the jungle to Alice.
Moira hears Magnus talking about how fun and cool his granny is and decides to show Caitlin she can be cool too. Mrs Juniper has plans for a new display at the Wobbly Coffee Pot
Daisy goes to help a poorly donkey on the farm but is acting rather oddly. It's up to Molly and Mack help her. James tries to make Moira laugh, but nothing seems to work.
Baby Maddy won't stop crying until Bob sings her a lullaby. But when Maddy wakes up, Bob has gone to his allotment. Molly needs to work out how to get her baby sister to sleep.
Mack's got a place at college. He's not sure that he should go as he'd need to act and dance, and he doesn't think he can. Molly has a plan to prove to him he can do it.
Kez shows off her new invention - carrot carriers. She accidentally cuts up curtains that are precious to Molly to make more. How can Kez make her mistake up to Molly?
It's Molly and Mack's last day in the Big Hub. They both tell each other that they don't want a goodbye party, but they really do. Caitlin has big plans, and a great time is had by all.