Martha feels ignored by her workaholic mother so Jas helps her to rebel to get noticed. It backfires and Jas herself ends up getting detention! Martha does manage to misbehave in the end, but when her mother suggests all sorts of traditional 'mother and daughter' activities to make amends for having neglected her, it sounds like hell to Martha and she quickly decides she'd prefer her old workaholic mother back! Meanwhile, Lily would love her embarrassing mum to be a whole lot less involved, and wishes she'd stop knitting her jumpers with her face on! When her mum is determined to find out who Lily's 'boyfriend' is to invite him round for tea, Lily pretends she fancies Ollie - to avoid revealing that she actually likes Matt Furnish and risk the embarrassment of having her mum fuss over him. Ollie comes to tea and gets carried away with pretending to be the boyfriend, and the only way Lily can shut him up is by 'dumping' him there and then.
Lily, Martha and Jas are smart but socially awkward girls trying to make sense of life, boys and fitting in. 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. 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. 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. 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 decides her bedroom is babyish and needs a makeover to reflect the fact she's now a sophisticated teen. Meanwhile in Life Lessons class, Martha and Ollie volunteer to be parents to a new 'baby app', thinking it'll be an easy task. Utterly defeated by the baby app's constant crying and demands they palm 'baby' off on Cassie and Maxwell, who in turn are soon at their wits' end.
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. Meanwhile, Mr Salford has been asked to make a presentation to become the area youth hockey rep. Terrified of public speaking, he gets Mrs Griggs to help him.
The girls create science projects for Experiment Friday. Jas transforms 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. Meanwhile, Lily and Martha have been paired with Cassie and Maxwell. Lily is fretting that she and Rob are obviously incompatible as he hates her favourite naturalist Steve Batchelor and Cassie and Maxwell decide to 'study' Lily as part of their science project, researching teen relationship issues.
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. Meanwhile, Mrs Griggs has got a girl crush on Ms Parfitt and thinks Ms Parfitt's street dance class is the perfect opportunity to impress her.
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. 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 three-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. Lily gets angry, and Rob is so easy-going he simply backtracks and agrees to partner with Lily. This makes Lily even more upset - Rob is so chilled out it's like he doesn't care! Lily tells Cassie and Maxwell about Rob's inability to get angry and they decide to cure him. Meanwhile, there is competition amongst the parents about who should organise the fun run this year.
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. Meanwhile, Mrs Griggs launches a mentoring scheme and Maxwell picks Ollie. At first Ollie is flattered, but he soon becomes fed up with Maxwell beating him at chess.
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!
When Lily and Martha get the flu, Maxwell and Cassie are roped into a school quiz.
Martha is offered a place at Greatacre, the boarding school her mother once went to. Ollie can't cope with the idea of Martha leaving and Alfie also goes overboard mourning her potential departure. Ollie is jealous and the two boys go head to head, trying to out-mourn one another. At first both Martha and Mrs Fitzgerald are keen for Martha to accept her place, but Martha starts to have second thoughts. Meanwhile, Lily is excited to learn a Premier League football scout is coming to the school to assess Rob. Jas decides to help coach Lily in how to become the perfect WAG...
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.
Lily has a big announcement - she's going to tell Rob she loves him... but first she's going to build him a football stadium out of lollipop sticks.
On the day Martha asks Lily for the 7p she owes her, Lily inherits a lot of money. Determined to prove Martha is petty, Lily decides to share her wealth with everyone.
Lily's gut instinct tells her that fellow pupil Carla fancies Rob. Rob denies this but Lily sets out to prove her gut instinct is correct with the help of Martha.
Snobby Ollie mocks Mr Malone's ancestry, inspiring the gang to teach him a lesson. Then when Ollie discovers he's actually related to Mr Malone, his dreams begin to unravel.
Rob enters a modelling competition and Lily is determined he will win using 'the look'. Martha practices dating.
Lily and Jas fake a falling out to get Rob and Sid to stop arguing, while Ollie and Martha train Mr Malone to be a better teacher.
Lily plans a perfect date night to celebrate her anniversary with Rob... but her mum and Ken might ruin everything. Meanwhile, Martha reluctantly agrees to a tech detox.
Lily, Martha and Ollie become Prefects and the power goes to their heads.
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.
Martha and Ollie are confident they can win the McSherman Science Prize, but they have one tricky formula to work out - how to subtract Rob from their team without losing Lily.
The girls follow an app promising future success, but can they resist their weaknesses?
Lily is delighted to be waitressing at Mugshotsz café, until Jas joins her. Martha is stunned to discover Ollie has a girlfriend, and Rob is upset Sid might leave Cranmede School.
Jas's lie to Lily snowballs into a charity sumo wrestling bake-off event! Martha and Ollie compete to win awards by teaching tech to pensioners, ex-punk Jonny and chatty Mazel.
Head boy Hunter has a crush. Lily, believing it's her, plots to let him down without smashing his heart to bits. Martha and Kat compete to have a statue erected of an Amazing Woman.
Lily lies to prove she is a good actor, Ollie researches to prove he is not a defective detective and Martha tries to prove to Jas that Sid has another girlfriend and telepathy doesn't exist.
For his PE module, Rob offers free personal training sessions, but things go awry when Mr Malone agrees to be his student. Meanwhile, Lily and Jas ask the universe for help.
Lily goes into overdrive and organises the best Valentine’s Day ever!
For Mugshotsz Open Mic night, Martha and Mr Malone join forces in a bid to beat competitors Ollie, Kat and Hunter. Jas and her little 'friends' threaten Lily's hopes for big tips.
Ollie manages Mugshotsz for the day, but the power goes to his head. Meanwhile, Lily and Jas go on strike and Mr Malone and Lou are trapped.
Ollie and Rufus beat an unbeatable video game and celebrity vlogger Jam9T7 wants to know how. Lily and Jas’s mission to expose enviro-crimes leads to a surprising revelation.
Ollie has agreed to host a science radio show with Martha, but he hasn’t got round to telling Kat. Lily and Rob search for a song for them to not just love, but love love.
Selecting the right work experience gets bumpy. Lily's dream of being an actress turns into a nightmare, Ollie regrets his career choice, and Martha's indecision leads to a crisis.
Lily gets addicted to a virtual reality game, Ollie is forced to express his feelings and Martha wins a competition she didn't enter.
Can Lily have a perfect Christmas when Ollie is allergic to Christmas, Sid hates Christmas, Rob thinks Lily's presents are terrible, Jas is upset with Sid and Martha is leaving?
Martha and Lily compete to be head girl, while Ollie has a terrible dilemma to resolve.
Kat's plan backfires, while Lily and Jas force Martha and Ollie to spend time apart.
Lily and Jas go to extreme lengths to avoid admitting they don't want to travel together.
Lily pretends to be a model, while Martha tries to be a great waitress.
Lily has a new boyfriend, and Martha and Ollie use science to prove Lily is not over Rob.
Lily and Martha compete to be best friends with exchange student Kesia. Meanwhile, Ollie has to write his student thesis from memory and Mr Malone tries to write a novel.
Fed up of being excluded by her coupled-up friends, Lily decides to break them up.
Martha and Kat use maths to create a dance track and become overnight pop stars, but they argue over their second tune. Lily gets competitive. Sid gets writer's block.
Lily and Jas go crazy when Mazel introduces a new cake that has 250,000 followers.
Sid has a hair crisis, Jas learns to ride a boiled egg and Mr Malone betrays ThunderBun.
Martha and Lily try to find each other boyfriends. Meanwhile, Ollie is stressed.
Lily is excited about prom, but none of her friends want to go.
