It's the start of a new school term at Elmsbury High for both Josh and Nathan, who returns to job of teaching English and managing the newly refurbished 'Four O'Clock Club'.
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. But Nathan is too distracted by a misunderstanding about the date, so Josh concocts a plan to help Nathan's bid for the job. But without Nathan's help, Josh has to turn to new music assistant Dexter for a solution.
When a heartbroken Nathan leaves Elmsbury to take up a post in Scotland, Mr Bell needs someone to run the 4 O'Clock Club. Dexter enthusiastically steps up, keen to prove himself to Mr Bell, 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 there are 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. How will everyone beat the security lockdown?
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 computer. But can he behave well enough to earn the points he needs?
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 out by the teachers or his mum?
Dexter wants the pupils, learning, rights and responsibilities. He encourages them to make a video about the new scheme. Josh seeks this opportunity to shoot his own rap video, but when the whole thing collapses, Dexter is removed from the running of the club, but do the kids have the rights and responsibilities to get him to run the club again?
Josh has written his best track ever and decides he's going to sell CDs of it in school. But when he realises he's sampled a famous track without permission he has to get all the CDs back before he's 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. Nathan and Melanie then share a kiss.
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. And 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. Nathan proposes to Mel in front of everyone at Elmsbury.
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. Meanwhile, 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. Meanwhile, 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. Meanwhile, Fleur and Eleesha get roped into Mr Nunn's boys only boxing club.
Nero is keen to get home to see his dad who is visiting. But when he gets stuck in 4 O'Clock Club he snitches on Eli and Owen in order to be let out early. Eli and Owen try to start an online viral to rival 'planking'. They come up with the idea of 'mug-treeing' - balancing as many mugs on yourself as you can. Lacking supplies, they decide to sneak into the staff room after school and use the piles of mugs there. Up for an adventure, most of the 4 O'Clock gang join them. Unfortunately, due to a defective security system they get trapped in the school and Nero has to save the day by rescuing them. Meanwhile, Josh bunks off school to go to an all-day music conference, but when he gets there he finds Miss Parkwood bunking off too. The pair of them end up singing a cheesy duet.
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 run radio station. Josh is planning to run a radio station 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. Meanwhile, 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. Meanwhile, 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. Meanwhile, will Mr Bell or Mrs O'Brian be chosen as the schools only headteacher?
Elsmere has moved to a new building. Everybody is stressing out, especially Mrs Goodman. Darnesh, Cj, Amber, Ingrid and Violet decide to play with the removal boxes. But it does'nt turn out to be such a good idea. Meanwhile Polly has a radio solo, but Nero with a hope of being famous jumps in. First it's going great, but everything turns to a disaster.
Nero encourages Mrs Goodman to make a lip dub video to celebrate Elmsmere, Polly tries to retake a test to get full marks, and Darnesh loses a glasses lens to Amber's newly discovered peephole into the staff-room.
Dexter, Lizzie and Nero are leaving Elmsmere for good - but Dexter has second thoughts after meeting the teacher that will be stepping into his shoes. Amber, CJ and friends try to interview the new music teacher.
Dexter, Lizzie and Nero are leaving Elmsmere for good - but Dexter has second thoughts after meeting the teacher that will be stepping into his shoes. Amber, CJ and friends try to interview the new music teacher.
Mr Boyd mistakes Owen for a teacher due to the latter wearing his grandfather's coat, causing confusion when Owen's party coincides with the teacher's party. Amber and Violet try to finally put a stop to Darnesh's Big Birthday Fun List.
A phantom prankster makes Polly reconsider her role in her friendship group. Mr Bell tries to win over Miss Harper but regrets doing so, and Amber's plan to ruin everyone's perfect attendance to win a scooter backfires.
Amber tries to form a band to beat Ingrid in a battle of the bands contest. Polly risks getting into trouble when she can't get rid of a face tattoo, and Mr Bell finds Miss Harper a new home - in his flat.
Mr Bell loses Miss Harper's son on a school trip to the museum, whilst Amber uses Darnesh to convince Ingrid the museum holds a cursed mummy. Polly tries to avoid punishment from her mum by setting up a fake art gallery.
Owen faces a dilemma when he tries to earn a Scouts badge using a dummy. Meanwhile, Polly, Eleesha and Fleur have to chase a weather balloon, and Isaac must learn maths from Mr Nunn.
Mr Bell's magic performance is put at risk after Isaac causes a series of catastrophic events by trying to catch a rat with Darnesh's cat. Polly's plan to help Owen move on from Katie backfires.
CJ has trouble convincing Mr Bell to go on a family holiday he's won, Amber challenges Ingrid on a mobile game, and Owen is forced to be the prize to a rigged raffle when Eli blows the budget on t-shirts.
Darnesh's questions his newfound modelling career when he's told he's going to have to model nude. Eleesha and Fleur lie to Polly to get out of a trip, and Owen is left feeling lovesick yet again.
Bell cancels Christmas at Elmsmere, upsetting everyone - including CJ, who buys a turkey for Christmas dinner. What he doesn't realise is that the turkey's alive, so he must hide it in Elmsmere. Bell is visited by a series of ghosts who want him to mend his ways.
New boy Evan causes trouble for Polly, who's keeping an eye on him, by climbing onto the school roof. An old library book leads Darnesh to believe reality is collapsing, and CJ attempts to hide his lack of socks by painting his ankles.
Owen discovers Fleur's new 'boyfriend' is actually Katie and to split them apart, convinced it's for Fleur's sake. Eleesha is left feeling abandoned, so she turns to Polly. Nunn and CJ battle over a pair of old pants.
CJ isn't happy when Bell hands in his letter of resignation to become a yellow coat at a holiday camp in Wales. Amber pretends she's a ghost to get free snacks from Darnesh, and Eli and Fleur must learn to tango.
Amber and Eli shockingly sign up for Book Group - but only because they want the food. CJ and Jack accidentally destroy Isaac's robot mop, and Owen finds the perfect subject for his psychology presentation: Evan.
Danny's attempts to ask PC Rowe out lead to disaster when he risks getting caught for a fake crime he committed to get her attention. Amber needs the identity of a 16 year old to win a lifetime's supply of chocolate - so she uses Polly.
Bell forces Amber and friends to join Chester's debate club, but nobody's happy with this arrangement. Danny encounters problems trying to get PC Rowe a birthday cake, and Nunn surprisingly opens up to Owen.
Eli gets mistaken for a patient whilst visiting his Nan in hospital. Darnesh accidentally gets stuck in a giant locker, Owen is lead to believe Katie is interested in him again, and Polly tries to get Evan to tell her how he feels.
Nero is out in Los Angeles seeking fame and fortune, but is faced with the harsh reality that he's just another wannabe trying to become famous. Owen and Eli accidentally board the wrong plane trying to visit Nero in the States.
Bell is all set to perform at a magic show at the weekend - but Mrs Morgan wants him to present at an education conference on the same day. CJ is ready to move in with his mum and he'll do anything to get out of doing the show with Bell.
Eli and the gang join Chester's tabletop role-playing game, but only to make a mockery of Owen. Amber, Violet and Ingrid contest over hunk William, and Polly is forced to become Elmsmere's pupil PC.
Darnesh can't wait to eat his jar of pickled eggs - but Bell confiscates them, and the expiration date approaches. Eli enlists the help of Fleur and Eleesha to ask out a girl, and Polly finds out what Evan's home life is really like.
Danny tries to reward the kids with special prizes at the end of term - but none of them seem to care. Polly fears she's ruined Evan's life by trying to help him, Nunn challenges Isaac to a race, and Bell risks being sacked.
Bell's staff training session is ruined by Chester's disastrous fire safety inspection. Meanwhile, Owen and Evan sneak into school to avert a disaster of their own.
Eleesha celebrates her seven-year friend-i-versary with Fleur. And 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. And 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. Meanwhile, 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! And 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.
When Clinton forgets Emily’s birthday, he finds a perfect last-minute gift in school lost property! Meanwhile, 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? Meanwhile, 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! And 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. And 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. And 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? Meanwhile, Reiss and Coco’s mum could be home from prison - but is that really such good news?
