It's the end of term and Nathan is due to be assessed by headmaster Mr Byron. His future hangs in the balance. So when Josh messes up, and it looks like Nathan's career as a teacher is over, it's down to the rest of the 4 O'Clock Club to save his skin.

Nathan puts the star of Elmsbury's basketball team in detention.

Since Jamie Oliver's push for healthy school meals, sweets have been banned at Elmsbury High. But someone is running an unofficial tuck shop selling crisps and chocolate - and Nathan is given the job of finding out who is behind it.

Nathan gets lumbered with running the school council and drags Josh in to teach him about responsibility. But instead, Josh uses his new powers to try to change the rules to his own advantage.

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. But without any valuables to give to the cause, Josh opts to donate Nathan's stuff instead.

Nathan drags Josh onto the useless school quiz team to teach him how to stick at something. But Josh realises to his delight that him not knowing any answers will only make Nathan look bad.

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 teacher Thorne's strict disciplinary regime.

Nathan takes advantage of Mrs Carter's weekend trip away to invite Miss Poppy round for a romantic evening. Unfortunately, Josh has chosen the same evening to invite his entire class round for a party. When Mum returns unexpectedly early, the brothers have to rap their way out of trouble.

When Nathan's laptop mysteriously breaks down in the middle of a project, Josh is the obvious suspect. Josh dodges the problem by suggesting Nathan borrows a replacement from the terrifying Miss Andress's IT classroom. But when that laptop goes missing, which of the Carter brothers will end up carrying the can?

The school disco means just one thing for the Carter brothers - girl trouble. Josh accidentally invites Zoe-Marie to be his date, while Nathan tries desperately to impress the gorgeous Miss Poppy and tempt her to join him in the teachers' dance. Only Ash has any success with the girls - in fact, more success than he can handle.

To get out of maths homework, Josh claims he has number blindness and persuades novice supply teacher Janucek to let him off. When Nathan discovers Josh's dodge, he decides to educate his kid brother himself - though when it comes to numbers, Nathan is as short-sighted as Josh. But at least they can both count the beats when they are rapping.

Having his brother Nathan as a teacher at his school is having a disastrous effect on Josh's ability to have fun, scheme schemes and scam scams. Josh raps that the school is 'his manor', not that of his big brother the 'spanner'. So when Josh notices that Nathan is more than a little interested in music teacher Miss Poppy and her modern take on Cinderella, Josh tries to get him off his case by setting up Nathan as her Prince Charming.

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