To everyone's surprise, not least Nathan who was hoping to impress him, Byron has been replaced by the dynamic Mr Bell, who promptly announces that the school is to become an academy.

Nathan finally decides to ask Miss Poppy out, but it's on the day that Mr Bell is to select a head of year and Josh is determined that Nathan gets the post instead of Thorne.

A heartbroken Nathan leaves Elmsbury to take up a post in Scotland, so Dexter enthusiastically steps up to run the 4 O'Clock Club. But when Josh discovers that Dexter is also his mum's new lodger, he makes it his mission to take Dexter down.

Bell initiates a big clamp-down on security and truancy in school, meaning no more visits to the ice cream van just outside the front gates. But worse for Josh, there's a game he wants to buy in a shop that is shut out of school hours.

Bell has organised a tour of the school by visiting headteachers, including Dexter's dad. But Dexter has exaggerated his role at the school and has to get Josh's help to maintain his lie.

Bell starts a scheme where good behaviour is rewarded with points that can be converted into prizes. Josh realises that with enough points he can buy his dream tablet.

Josh needs Dexter's help to finish off some new tracks, but doesn't want to look uncool by hanging out with a teacher. But Dexter has other ideas and plans to take this beautiful new musical partnership public.

Dexter takes the 4 O'Clock regulars on a half-term camping trip. But due to a mix-up they have to turn back and head home. To salvage something from the trip, Josh comes up with a bold idea for where they can camp instead.

Josh is suspended for a day. Unfortunately it's on school careers day, and a record label guy Josh is keen to impress will be there. Can Josh get in to meet him without getting caught?

Bell brings out a new code of conduct outlining the rights and responsibilities of each pupil. Dexter encourages the 4 O'Clockers to make a film about the new scheme. But Josh has other ideas and wants to use the camera to shoot his new rap video.

Josh has written his best track ever and decides he is going to sell CDs of it in school. But when he realises he has sampled a famous track without permission, he has to get all the CDs back before he is caught.

When Dexter enforces the no-phones rule in the 4 O'Clock Club, Josh rebels and decides to test once and for all just who is in charge in detentions, the teachers or the pupils.

Dexter finds himself fronting Bell's new plan for Elmsbury - Project Zenith. But the plan has big, bad implications for the 4 O'Clock Club. Josh sets out to defeat the scheme, with a little help from his friends and family.

When Mr Bell decides to ban Christmas, it's up to the 4 O'Clock Club gang to bring a bit of festive cheer to Elmsbury. While Josh makes it his mission to play Santa for one lucky person, Nathan comes home for the holidays with a big surprise for everybody.

It's Nathan and Mel's wedding. And with Nathan in charge of the cake, Josh in charge of the best man's speech and Zoe-Marie in charge of the presents, what could possibly go wrong?

After Elmsbury burns down after the wedding, Josh and Nero arrive at their new school. Nero decides it's time to have some fun, at Josh's expense. Dexter tries to impress his new colleagues with a first aid demonstration and nearly scares his new pupils to death.

Josh and the gang are accidentally picked for Mr Nunn's cross country team. When Mr Bell's new statue gets damaged, suspicion falls on the 4 O'Clockers.

Nero accidentally loses £60 of Josh's money which Mr Bell spends on a bench. Nero and Josh have to work together to get the money back, or get revenge.

When Dexter starts a choir, Josh thinks it is the lamest thing in the world - until Rachel joins and Josh decides it is the perfect way to get close to her. Fleur and Eleesha get roped into Mr Nunn's boys only boxing club.

Eli and Owen try to start an online viral to rival 'planking'. Josh bunks off school to go to an all-day music conference, but when he gets there he finds Miss Parkwood bunking off too.

When the 4 O'Clock Club gang fail to set up work experience placements, they are given jobs in the school. But if this lot are lousy pupils they are absolutely terrible teachers.

When Josh discovers some old radio equipment at school, he persuades Dexter to run a pupil radio station. Josh wants to make himself a star and get a date with Rachel, but he hasn't bargained for the other 4 O'Clockers getting involved.

Dexter gets the 4 O'Clock Club digging the school allotment. But boredom with broccoli turns to delight when Josh strikes gold. Nero joins Owen at Scouts and discovers that under the uniforms those guys may not be as silly as they look.

Josh is planning to take Rachel to a music festival. But when Mum insists Josh goes with Dexter instead, Josh has to try to get a spare ticket for the sold out festival from nerdy Natalie. Trouble is, Natalie has promised the ticket to Nero.

Josh wants to put a gig on at a village hall. But when Mum refuses to sign the booking form, Josh takes matters into his own hands. Mr Bell's scheme to create school prefects doesn't go as smoothly as he hoped.

When Josh auditions for a place at a performing arts school, it could mean that his days at Elmsmere and the 4 O'Clock Club are numbered. Will Mr Bell or Mrs O'Brian be chosen as the schools only headteacher?

Nero goes hunting for the school ghost, but will he have more trouble from new girl Clem?

When Nero accidentally lets the school toads escape he sets off a chain of events that gets Dexter into serious trouble. Is this the end for the 4 O'Clock Club?

Clem and Nero are both suspiciously keen to go on the school theatre trip, but why?

Nero's new bike proves to be a disaster, not just for him, but for Clem and Dexter too. Someone will have to pay.

Nero discovers a book of angry poems written by Clem. But how angry will Clem get when she discovers the book is missing?

Nero pulls a sickie to get off school, but will a suspicious Dexter find out?

Nero and the gang decide to sabotage parents' evening. Josh and Isaac find out the truth about Josh's missing dad.

Nero and the gang find themselves playing netball against a team of girls.

Nero needs his confiscated phone urgently, but how can he get it back without Miss Andress finding out?

Nero gets invited to the coolest party of the year. There is a surprise winner of the school presidential election.

Lizzie's lunchtime science club has disastrous consequences when Eli and Owen decide to join.

Nero fakes an injury to get out of cross country but discovers that playing the victim doesn't give him the easy ride he was hoping for.

When the school play looks like it might be cancelled, Nero gets angry and runs away from home. Clem is forced to go with him.

Nero discovers that he might have to leave Elmsmere Manor forever.

Nero is back, but only for two days. He is determined to win the talent contest.

Nero joins Clem's swimming club but soon finds he is well out of his depth.

Nero's camping trip is threatened by Dexter's plans for a romantic weekend away.

Clem freaks out when she thinks Nero has sent her a CD of love songs.

Mrs Goodman establishes a kids' court and Nero attempts to escape the law.

Nero and the gang help Mr Bell move house, with disastrous results.

When a social worker pays a visit, Nero pretends his home life is perfect.

Amber decides that she doesn't want to be babysat by Nero.

Nero has to stop Bell from becoming deputy head.

Clem has never had a Valentine's card. Can Nero pluck up the courage to send her one?

An incredibly rare flower is discovered on the football pitch.

Who will Nero ask to go with him to the school dance? And why isn't it Clem?

Can Nero and Clem's summer romance survive the start of a new term at Elmsmere?

When Clem gets a part in a TV advert, a jealous Nero tries to get himself cast as well.

Could Clem's big break in the music industry spell the end of her friendship with Nero?

Lizzie starts having labour pains but where's Dexter? A special musical episode.

Nero does a volcano science project, but it's his partner Polly who looks set to erupt.

Nero is psyched to be paired for a project with Polly, until he develops a mystery rash.

Mr Bell looks for his old massage chair in a skip, but discovers a much bigger surprise.

Nero takes Polly to see her favourite band, but he has to hide how he got the tickets.

Owen bunks off school to avoid sports day but finds himself trapped in a living nightmare.

Nero's excited to dance with Polly at a flashmob, until he learns she has two left feet.

Nero and Dexter do Owen's paper round but mess up the most important delivery.

Nero, Dexter and the boys go camping but teachers Nunn and Bell tag along.

Will Dexter and Lizzie's last-minute wedding be a happily ever after or a total disaster?

Polly is singing a solo with the school choir live on radio. Unfortunately the newest member of the choir is Nero, and he has other plans.

Nero makes a film to celebrate the school, but his real plan is to make himself a star. Meanwhile, Polly's efforts to retake a geography test bring her into conflict with Mr Nunn.

Dexter and Lizzie have the chance to move to America, but how will they break it to Nero? And how will Nero break the news to his friends?

Nero's finally leaving Elmsmere, but how is Polly going to take losing her best friend? And will Dexter have second thoughts about going when he's introduced to his replacement?

Owen loves wearing his granddad's coat, until his look means he's mistaken for a teacher. Amber and Violet try to avoid the list of stupid celebrations for Darnesh's birthday.

There's a phantom prankster on the loose in school but if it's not Eli then who can it be? Amber is determined to win a scooter in a school competition, whatever it takes.

Polly can't wash off a fake tattoo. Can she get through the day without Bell discovering? Ingrid gives a remarkable performance in a battle of the bands competition.

Bell agrees to take Maddie's son on a trip to the local museum, but loses him. Amber tries to convince Ingrid that mummies really exist, using Darnesh and some toilet roll.

Polly launches a phone into space on a weather balloon. Owen decides to earn his Scouts entertainment badge with the help of Dinsdale, a ventriloquist's dummy.

Isaac tries to catch a mouse in school using Darnesh's cat, with disastrous consequences. Polly tries to help Owen move on emotionally by getting Katie a new boyfriend.

CJ wins a family holiday and has to get Bell and Maddie to pretend they're married. Polly holds a raffle for cash to decorate the common room, but what will they use for a prize?

Fleur and Eleesha get out of a boring trip with Polly by inventing Fleur's fake nanna. But when Polly realises they're lying, she decides to take her revenge.

Polly plans the end-of-year Talent Show, but could it mean the end of her school career? Amber tries to impress Ingrid by inventing the craziest talent act of all time.

Everyone’s full of festive spirit at Elmsmere apart from Ding Dong, who cancels Christmas. But he’s forced to reconsider his decision when he gets some very surprising visitors.

Polly’s first day of term doesn’t go to plan when she’s asked to look after troublesome new boy Evan. Meanwhile, Bell’s return as head teacher is doomed to failure from the start.

Everyone is curious about Fleur’s new boyfriend, but his secret identity is more surprising than any rumour. CJ and Nunn go to war over a pair of second-hand underpants.

Darnesh discovers his locker is haunted by a hungry ghost with a sweet tooth. Meanwhile Eli and Fleur learn to tango, but the dance of love could spell the end of their friendship.

Can Amber eat the delicious snacks served at book group, but avoid reading the book? When Owen needs a case-study for psychology he thinks badboy Evan is the perfect subject.

Danny wants to ask PC Rowe on a date, but will nerves mean he’ll never find romance? Amber’s plans to win a lifetime’s supply of chocolate get awfully messy.

Danny gets PC Rowe a birthday cake, but his icing skills leave much to be desired. The death of the school hamster brings up some unsettling memories for Mr Nunn.

Eli visits his poorly nan and discovers that hospitals can be much more fun for patients than visitors. Darnesh’s prank with a locker backfires when he gets stuck in it.

Nero heads to Hollywood to see if he can make his fame and fortune as a singer, dancer, rapper and all-round megastar. However, making it big in the Land of Opportunity is harder than he expected.

Bell is booked at a magic conference, but the real trick is how to sneak out without Mrs Morgan knowing. Nunn finds himself in a running battle with Isaac’s pet goat.

Polly’s perfect day with Evan suddenly goes horribly wrong. Eli thinks Owen has a secret girlfriend, but gets a shock when he learns who Owen is really hanging out with.

Darnesh has to eat a jar of picked eggs before the sell-by date expires. Eli sees the girl of his dreams but makes the mistake of involving Fleur and Eleesha in his lovelife.

Polly has helped Evan with his family, but can he ever forgive her for revealing his secret? Owen and Chester compete to see who will win the Pupil of the Year trophy.

Bell's staff training session is ruined by Chester's disastrous fire safety inspection. Owen and Evan sneak into school to avert a disaster of their own.

Eleesha celebrates her seven-year friend-i-versary with Fleur. When Bell’s magic trick goes wrong, Isaac helps him sneak out of school, with disastrous results.

Reiss decides to get a confiscated toy back by borrowing a set of master keys for the school. Bell appoints an ambitious new deputy head, but will he regret his choice?

Reiss hacks Clinton’s emails and finds a secret that risks Clinton’s future with Emily. CJ hatches a plan to escape Elsmere, and Amber plots to get Isaac a pay rise.

School parents' evening has some big surprises for Reiss, Magnus, Henry, and Mr Nunn. Eleesha gets a driving lesson to remember from Isaac.

Evan helps Polly out when she lies to her mum, and ends up having to join the Scouts with Owen. Amber and Darnesh hatch a plan to become chip shop millionaires.

Nunn is forced to spend quality time with Henry and takes him on a weekend fishing trip. Miss Wrigley wants her portrait painted and makes the mistake of asking Darnesh.

When Clinton forgets Emily’s birthday, he finds a perfect last-minute gift in school lost property. Polly and her mum go on a trip, so Evan plans a party at their house.

Owen has a date and needs to learn how to kiss fast, but who will volunteer to teach him? Darnesh rewrites Bell’s boring autobiography to make his life sound more exciting.

Coco’s school uniform gets ruined so she borrows Henry’s spare outfit, an Elvis costume. Chester turns detective when he discovers a borrowed book is missing from the library.

Violet dreams of playing the cello but hasn’t bargained for competition from Darnesh. Nunn gets some unwelcome help from Henry when he is ordered to fundraise for the school.

When short-sighted Nunn runs out of contact lenses, Henry steps in as his human guide dog. Clinton gets Reiss excluded from school, but has to keep it secret from PC Rowe.

Can renting a swanky limo help Owen get a date for prom? Reiss and Coco’s mum could be home from prison, but is that really such good news?