Martha feels abandoned by her workaholic mother, so she tries to get into trouble at school to be noticed, with the help of Jas. Unfortunately, this is not as easy as it seems. When her mum realises that Martha is feeling abandoned she tries to fix it, but Martha realises that she would rather have her workaholic mother the way she was before. Meanwhile, Lily is tired of her mother knitting her embarrassing jumpers and asking her if she has a boyfriend. She gives up and pretends that Ollie is her boyfriend, with disastrous results.

Martha is mortified when she gets an A− on her test, so she revises so much that she begins to faint all over the place. Mrs. Griggs gets worried about her, so she decides to make Matt her 'fun' tutor. At first Martha is annoyed, but she soon learns that she can have fun, and she helps get Matt's grades up. Lily is jealous that Martha is spending so much with Matt, and Ollie is jealous that Martha is always with Matt, so Jas comes up with a plan to put them together.

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.

Martha is troubled when she's the only one who hasn't cried in assembly meaning she has to find a way to get the different feelings which make her cry if she wants to change the world, meanwhile Matt wants to audition for a school band with another popular girl which makes lily jealous. Matt doesn't get the place in the band but still wants to perform so he decides to perform in front of the school but when he loses his voice he needs Lily's help. Lily ends up singing the song which leads into Matt and Lily becoming a couple.

Lily realises she's turning out to be just like her mum. 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. None of her strategies work.

Meanwhile Rufus, who has a big crush on Martha, is helping her with her conversational Spanish. When Rufus asks Martha out and she says no he figures she must already have a boyfriend and guesses it's Ollie. Uncomfortable with the situation, yet anxious still to keep Rufus as her tutor, Martha decides to pretend she is actually going out with Ollie.

History teacher Mr Malone is jealous when new geography teacher Ms Parfitt arrives on the scene and all the pupils are excited about how brilliant a teacher she is. When it's announced there is not enough money to fund both a geography and history field trip and the most popular trip will be the one that gets the funding, both teachers go head to head in a fierce competition to get their field trip chosen. 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. It backfires - she eats disgustingly in his presence intending to shock him, but he doesn't even notice. By contrast, Ollie is sick of being treated by the others as one of the girls and Rob agrees to teach Ollie to be more 'boy'.

A business studies competition is announced at school, and both Lily and Martha desperately want to be project manager. Lily thinks she would be the best candidate because the task is to organise a fashion show and she is more creative. Martha wants to be project manager so she gets to meet her business hero Sir Adam Salt. It is decided the role will go to the one who can come up with the best outfit design. Lily is confident she will win, but against the odds Martha wins with her 'lab coat' design.

Jas is asked to be a bridesmaid and is worried about being too clumsy to pull it off. Lily suggests staging a mock wedding so Jas can have a rehearsal - with herself and Rob as the bride and groom! Lily goes all Bridezilla. 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. However, first Rufus is roped in to 'Team Jas' and then Ollie and Rob. Jas calls Ollie and Rob to the art room and when they get there it's all in darkness, until the lights suddenly come on and Jas and Rufus announce from the control room next door 'You're going to the moon!'. 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.

Martha starts acting oddly, getting emotional and over-reacting to things. She's horrified to realise that her hormones are kicking in. Lily sympathises - she feels the same. Jas isn't feeling any effects from her hormones but, not wanting to feel left out, decides to fake it. 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. Outraged, Cassie and Maxwell vow to fight for their rightful places on the team.

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. Jas thinks she's helping him by encouraging him to do the scariest things she can think of, but poor Alfie becomes increasingly traumatised. Jas realises that she really needs to help him achieve his own personal goal - spending time with Martha!

Meanwhile, Rob has to attend a History Catch-Up Club run by Mr Malone. Lily is frustrated, as she's hardly getting to see Rob at all and Ms Parfitt is jealous of the club's popularity.

The school 3-legged fun run is coming up. Lily wants Rob to pair up with her, but Rob has plans to run with Jenny Jones, who is more athletic than Lily. This causes an argument - well, Lily gets angry. Rob's so easy-going he simply backtracks and agrees to partner with Lily. This makes Lily even more upset - why can't he just argue back? He's so chilled out it's like he doesn't care! Even Rob himself starts to worry that there's something wrong with him.

Lily worries that Jas is feeling left out. With Ollie and Martha practically a couple as well as her and Rob, she decides Jas needs a boyfriend. When she hears Rufus talking lovingly about fungal spores, Lily mistakenly thinks he is talking about Jas. She thinks they would make a great couple and decides to coach Jas in dating. Jas is happy enough to play along at first, especially as the practice sessions involve much food! When Lily insists they all go on a double date to watch a school chess match, both Jas and Rob pull out at the last minute and Lily is distraught - her own relationship seems to be on the rocks!

Lily is delighted when Rob buys her a present for the first time - only it's a horrible bug-shaped brooch! Jas offers to break it accidentally-on-purpose so Lily won't have to wear it, but Rob catches Jas trying to smash it. Not wanting to drop Lily in it, Jas tells Rob she stole the brooch because she's in love with Rob herself and is so jealous of Lily. Rob believes this, but now Lily and Jas have to pretend to fall out and Jas has to pretend to be in love with an unnerved Rob!

Martha and Ollie's team always comes first in the school's general knowledge quiz. Lily is determined that this year she and Jas will beat Martha and Ollie. However, both Lily and Martha get the flu. Maxwell and Cassie are roped in as replacement team members for Lily and Martha, who continue to give orders from their sick beds. Jas is confident that she won't get sick because of her dad's homemade 'Salford Special' health drink. Jas and Maxwell in turn try to play on Ollie's hypochondria to gain the upper hand.

Meanwhile, Mrs Griggs has decided to perform a salsa dance before the quiz with a reluctant Mr Malone as her partner. When Mrs Griggs gets the flu Ms Parfitt has to step in.

Martha is offered a place in the elite 'Greatacre' school, facilitated and encouraged by Martha's mother Mrs Fitzgerald and her own 'Path to Greatness'. Martha announces to her class that she will be leaving at the end of term sending everyone into shock especially Ollie. Lily and Jas decide to treasure the last moments with Martha, but Ollie decides to break all contact from Martha to quickly adjust to this big change.

Mrs Fitzgerald commences introducing Martha to the ways of Greatacre which become more and more un-appealing to Martha. With a lack of other intellectual peers, Ollie attempts to make friends with Cassie and Maxwell. Alfie is also grieving so Cassie and Maxwell offer to judge each of Ollie and Alfie's Martha memorial books to find the biggest griever. 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. So she goes to great lengths to hide from Martha so she won't have to sign the transfer forms.

Ollie loses the memorial book competition, but Martha retrieves Ollie's discarded book and realises how much Ollie will miss her and that she will miss him too.

Mrs F recalls the favouritism given to Belinda Watts while they were both at the school and she still resents it seeking some revenge. When she finds out that the Cranmede school's 'Watts' prize, named after her rival Belinda, won't have a chance to be renamed after Martha if she leaves, she has her doubts about approving Martha's transfer. Finally, both Martha and Mrs F decline the offer to transfer to Greatacre.

Ollie, Rob, Jas and Sid enter Battle of the Bands with tuneless Mr Malone! Lily wants her mum's boyfriend Ken to like her, and Jas tries to introduce boyfriend Sid to her dad.

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.

The girls follow an app promising future success, but can they resist their weaknesses?

Lily loves working at a cafe until Jas joins her and changes things to make it a really fun job for her. Martha is shocked and upset to learn Ollie has a girlfriend and feuds with her due to her jealously. Sid says he may leave Cranmede school which Jas is surprisingly fine with but Rob is really sad about and goes all cheesy with Sid about it.

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 thinks that the Head Boy, Hunter has a crush on her. 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. Martha and Kat compete for their choice to become a statue for 'women who changed the world week'. 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 avoids Martha and Kat as he does not want to be pressured into voting for one or the other as he will get hatred from the other, so he pretends that he has no opinion on their choices. Martha is co concerned that she is only getting votes because Hunter asks them, which is not what she stands for.

When Lou at the cafe organises a play including Mr Malone but without Lily, Lily rebels and tries to prove to her that she is a good actor. Meanwhile, Jas is speaking to Sid telepathically and Martha sets out to prove to her that telepathy doesn't exist and that she is not still going out with Sid. Ollie is afraid that Kat will be disappointed in his intellectual abilities due to his recent inabilities to solve murder-mysteries.

Lily get addicted to a virtual reality game which allows her to be everything she's not. She ends up developing a crush on virtual character Jack Stormhart. Lily finds out that Rob plays Jack and tries to get Rob in virtual reality to admit to her that he likes the virtual reality girl better than his actual girlfriend, both of which are Lily without him knowing. Ollie is forced to express his feelings due to Kat's concerns about where the relationship is going, with help from Rufus. Jas submits a thesis of Martha's to a competition to go to the Large Hadron Collider, of which she attends in the summer. Ollie realises that he has unresolved issues with Martha of which he must address. Jas worries that Sid has fallen out of love with her due to her being too random compared to his college friends.

Lily plans the perfect Christmas Eve lunch for Martha, Jas, Ollie, Rob and Sid. Martha has a new boyfriend, Swedish Gustav, who sends Martha into a giddy and happy mood, but leaves Ollie distressed due to his planning on asking Martha out at CERN over the summer. Gustav much different to how the group invisioned him and is horrible to the group, including Lily's party whilst on video call. Martha is upset at Lily's response to Gustav and is glad that she is leaving for Sweden to see her boyfriend. Sid upsets Jas by expressing his dislike to sleigh bells and presents, Jas's favourite aspects of Christmas. Lily and Rob are upset with each other after finding out neither of them like the presents they receive from each other, so they donate them to Sid's charity present box. Lou and Mr Malone secretly plan a Christmas Party, but Jas and Lily believe they are hooking up.

Martha and Ollie have finally accepted their romantic feelings for each other and are now a couple. When Rob leaves Lily she is determined to prove to Martha that she is just fine by running for head girl against her, proving she is a force to be reckoned with. Meanwhile, Sid attempts to sabotage the ‘repressive ideology’ in a number of ways, including uncovering a rule saying that head boy and head girl can neither be related nor in a relationship. This distresses Ollie seeing as he is already head boy. Martha and Ollie end up taking the jobs as head boy and girl but Martha decides to end their relationship to do so, dismaying Ollie.

Lily is excited about the prom, but none of her friends want to go.