It stars Cleo Demetriou as Lily Hampton, Ameerah Falzon-Ojo and Emily Burnett (in series 6) as Jas (Jasmine) Salford, Sophia Dall'aglio as Martha Fitzgerald, Archie Lyndhurst as Ollie Coulton, Jamie Flatters as Matt (Matthew) Furnish, Samuel Small as Rob Edwards and Raif Clarke as Sid Bevan .

This series introduced new characters such as Maxim Ays as Seb (Sebastian) Faulks Smythe, Esmond Cole as Samson Rosling, Indigo Griffiths as Frankie Simpson, Arian Nik as Josh Cooper, Ellie Clayton as Claire Fox, Ali Kahn as Meg Watson and Steve Marsh as Steve Grinstead.

Martha and Ollie build a slang generator machine to help them come up with a cool slogan for the school graffiti wall.

Meanwhile, Jas tries to track down the inventor of a new slang word going round the school and Lily wonders what's in Matt's diary.

When she discovers her mum's school grades suddenly dropped from straight As to Cs and Ds the year she got her first boyfriend, Lily is desperate to avoid the same thing happening to her now she's officially going out with Rob.

She tries different strategies - hanging out with younger kids Cassie and Maxwell to keep herself young and planning an educational Saturday afternoon out with Rob rather than going trainer shopping.

Dirty tactics are employed by Mr Malone - he steals Ms Parfitt's coffee supply, so she's super-sleepy and unable to teach and tries to find out how she produces real smoke from her model volcano in class - almost getting himself blown up in the process.

Meanwhile, Lily is complaining Rob is too 'boy' - she finds his boisterousness and burping gross and decides to give him a dose of his own medicine.

A business studies competition is announced at school, and both Lily and Martha desperately want to be project manager.

As she plans the big day she gets so carried away that she actually has no time for Rob and snubs him, just when he's ready to take their relationship to the next level and ask Lily on a romantic meal out.

No-one wants to be Jas' partner for Experiment Friday, as her science projects are always too crazy and ambitious - meaning she gets really low marks.

She has transformed the art room into a spaceship to conduct an experiment into how teenage boys deal with being cooped up together on a long space voyage.

Faced with two seemingly hormonal teenagers, Mrs Fitzgerald and Mr Salford join forces to address their problem.

Deciding that exercise is a great antidote, they try to encourage Jas and Martha to join the new street dance class Ms Parfitt is running.

Martha and Ollie throw Cassie and Maxwell off the maths team, desperate not to be outshone as they were last year by the lightning-fast buzzer technique of the younger pair.

After what he considers a near-death experience stranded up a ladder, Alfie is determined to compile and complete a 'bucket list' before it's too late.

Maxwell and Cassie are roped in as replacement team members for Lily and Martha, who continue to give orders from their sick beds.

Meanwhile, Mrs Griggs has decided to perform a salsa dance before the quiz with a reluctant Mr Malone as her partner.

Ollie avoids Martha's attempt to work on their project to create a phone app controlled by blinking.

Mrs Griggs is worried that when Martha leaves, the schools grade average will fall and they will lose the funding for the dance studio that she manipulated to be named after herself.

It's Halloween and Jas goes to extreme lengths to cure Lily's many fears before her scary party, while Ollie falls in love with new girl Em.

Lily loves working at a cafe until Jas joins her and changes things to make it a really fun job for her.

First Appearances: Lou and Kat Martha and Ollie compete to win awards by teaching tech to ex-punk Jonny and chatty Mazel.

Meanwhile as part of World Humanitarian Week, Mr Malone appoints Jas as a 'secret shopper' to identify who isn't following the rules and being nice to everyone.

Lily, who is desperate to win the prize, is being driven mad due to consistent niceness and does whatever it takes to force Jas to admit that she is the secret shopper.

Lily develops a crush too but knows Rob is the right boy for her so she is instructed by Jas to be overly mean to Hunter instead.

Hunter helps Martha get signatures due to his crush on her whilst Lily still believes that he likes her and wants to get in with her friends.

Ollie is afraid that Kat will be disappointed in his intellectual abilities due to his recent inabilities to solve murder-mysteries.

Lou and Mr Malone secretly plan a Christmas Party, but Jas and Lily believe they are hooking up.