Rookie teacher Nathan Carter starts his first day working at his former school, and takes charge of the after-school detention class.

Josh notices that Nathan is more than a little interested in music teacher Miss Poppy and her modern take on Cinderella.

When Nathan's laptop mysteriously breaks down, Josh is the obvious suspect. Josh dodges the problem by suggesting Nathan borrows a replacement.

It's the end of term and Nathan is due to be assessed by headmaster Mr Byron. When Josh messes up, it looks like Nathan's career as a teacher is over.

To everyone's surprise, not least Nathan who was hoping to impress him, Byron has been replaced by the dynamic Mr Bell, who promptly announces that the school is to become an academy.

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 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.

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.

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?

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

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

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

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.

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.

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

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

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

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'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?

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.

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.

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.

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'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.

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?

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

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.

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.