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.

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?

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.

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 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.

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.

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 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?

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.

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.

To get out of maths homework, Josh claims he has number blindness and persuades novice supply teacher Janucek to let him off.

The school disco means just one thing for the Carter brothers, girl trouble. Only Ash has any success with the girls. In fact, more success than he can handle.

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

Nathan takes advantage of Mrs Carter's weekend trip away to invite Miss Poppy round for a romantic evening. Unfortunately, Josh invites his class over for a party.

Josh, Ryan and Ash sign up for the school football team to get out of lessons, but discover that even studying is preferable to PE.

Nathan drags Josh onto the useless school quiz team to teach him how to stick at something.

When the school's last remaining keyboard blows a fuse, Josh decides to help raise funds for new musical instruments by staging a charity auction.