Season 1 Episode 2
Cassie Sid wins Cassie's affections when he notices she is hiding her eating disorder, but it's Allan the taxi driver who takes her to the clinic. Meanwhile, Michelle's mother returns from holiday with new husband Malcolm, to discover the house has been wrecked by a party. Nicholas Hoult and Mike Bailey star, with guests Neil Morrissey, Danny Dyer and Arabella Weir

 
Season 1 Episode 3
Jal Jal aspires to win the Young Musician of the Year competition, but nobody recognises her achievements - not even her dad. Meanwhile, Tony has abandoned Sid, who lands himself in trouble when his dealer wants his drugs or his money. Nicholas Hoult, Mike Bailey and Larissa Wilson star

 
Season 1 Episode 4
Chris Pill-popping Chris wakes up to discover his mother has left home, but given him £1,000 to cover bills - so he throws several parties, before facing up to the fact that she may never return. Guest starring Sarah Lancashire, Charlie Creed Miles and Geoffrey Hughes

 
Season 1 Episode 5
Sid Sid has to face up to his history coursework, but despite having only a week to deliver before he fails the year, the poor lad still can't stop dreaming of Michelle. Meanwhile, Tony continues to manipulate him. Nicholas Hoult and Mike Bailey star with Josie Lawrence and Peter Capaldi guest starring as Sid's parents

 
Season 1 Episode 6
Maxxie and Anwar The history class embark on a disastrous school trip to Russia. Maxxie and Anwar feel the strain on their friendship when one of them fends off unexpected amorous advances, while the other deals with the father of a local girl he's fallen for. Nicholas Hoult, Mitch Hewer and Dev Patel star

 
Season 1 Episode 7
Michelle Michelle grows tired of her boyfriend Tony's antics and dumps him before her mother's latest partner tests her patience to the limit. When a dejected Tony hears there is a new man in his ex-girlfriend's life he starts plotting the rival's downfall. Arabella Weir and Danny Dyer guest star, alongside Nicholas Hoult and April Pearson

 
Season 1 Episode 8
Effy No one except Tony seems to notice that Effy's behaviour is growing more erratic, despite the fact that she never utters a word, and sneaks out of the house during the night. However, when he needs help with his little sister he finds he has driven all his friends away. Kaya Scodelario stars, with Nicholas Hoult and Mike Bailey

 
Season 1 Episode 9
Finale Nobody is in the mood to celebrate Anwar's birthday, Sid pulls himself together in a bid and tell Cassie how he feels about her and Tony runs out of luck as he tries to make amends for his behaviour. Last in series, guest starring Nina Wadia, with Nicholas Hoult, Mike Bailey and Dev Patel

 
Season 2 Episode 1
Tony struggles to cope with the consequences of the accident, and finds himself forced into an unlikely friendship with Maxxie. With one of the boys desperate to return to college and the other longing to leave, the pair realise they're going to have to help each other if they want to improve their respective situations. Harry Enfield, Morwenna Banks and Bill Bailey star

 
Season 2 Episode 2
Maxxie has a creepy feeling someone is watching him, but is unaware he has a stalker in the form of Sketch, a loner who is determined to do anything to get her man. Meanwhile, the school play - Osama: The Musical - is in danger of being ruined under the direction of lecherous drama teacher Bruce. Shane Ritchie guest stars

 
Season 2 Episode 3
Sid is not coping well with the change in Tony and worries that Cassie is enjoying herself without him in Scotland. Meanwhile, his terminally ill grandfather comes to stay and his uncle, cousins and estranged mother all turn up to say goodbye, but the cantankerous old man manages to upset the whole family

 
Season 2 Episode 4
Michelle's mother re-marries yet again, forcing her daughter to move to a new house and put up with a manipulative new step-sister who starts to inveigle her way into every aspect of her life, before trying to take advantage of an emotionally fragile Sid

 
Season 2 Episode 5
Chris is expelled from college after CCTV cameras catch him having sex with Buck Tooth in the science corridor. After being ejected from his accommodation as a consequence, the slacker is stuck living in Bristol's smallest bedsit and pursuing various temporary career options. Guest starring Harry Enfield, Siwan Morris and Stephen Critchlow

 
Season 2 Episode 6
Tony struggles to come to terms with the world around him and feels as if nobody understands him, until he finds solace with a beautiful stranger he meets while fleeing from Sid and Michelle. When he encounters her again during a university open day, he begins to question whether she actually exists or is a figment of his imagination. Sean Pertwee guest stars, with Nicholas Hoult

 
Season 2 Episode 7
Effy's home life is in disarray, her GCSE work is stacking up and her reputation as the wild girl stands in jeopardy. However, the added responsibility of looking after new girl Pandora proves to be exactly what she needs. Bob Crampton and Jan Ravens guest star

 
Season 2 Episode 8
Jal has a massive secret to keep, but with the burden of her A-level work, music school auditions and needy best friends, she struggles to contain it. When Chris asks her to move in with him, she is unaware that he has been keeping something from her as well. Mark Monero and Josette Simon guest star

 
Season 2 Episode 9
Sid organises a dinner party to celebrate the end of the A-level exams, but tensions are running high as Jal continues to deceive Chris, who is also lying to everyone - including himself. Cassie finds it too much to bear and runs away to a magical place where people are friendly and she can get along. Indie group Born Ruffians guest star with Hannah Murray and Mike Bailey

 
Season 2 Episode 10
The A-level results are released, but the gang refuse to look at their grades until they have attended a friend's funeral. When Sid is presented with a problem, Tony comes up with an enterprising solution that could restore the pair's relationship. Last in series, guest starring Mark Heap, Josie Lawrence, Nina Wadia and John Thomson

 
Season 3 Episode 1
Effy returns as queen bee of her class and is joined by best friend Pandora, while the guys are led by the irresponsible Cook. Twins Katie and Emily find themselves growing apart, while Thomas tries to adapt to the country after living in Congo. Kaya Scodelario, Lisa Backwell, Jack O'Connell and Merveille Lukeba star

 
Season 3 Episode 2
Cook decides to crash the engagement party of his sister's friend when his 17th birthday celebrations grow boring. The unruly teenager's actions catch the attention of notorious local gangster Johnny White, who looks set to throw him out until James discovers his seedy secret. Mackenzie Crook guest stars

 
Season 3 Episode 3
Pandora and Effy befriend an African teenager who has just arrived in the UK. Told to find a place for his family to live, the newcomer has to work out a way of earning money before he can rent a flat he has seen - run by local gangster Johnny White. Guest starring Maureen Lipman, David Baddiel, Mackenzie Crook and Merveille Lukeba

 
Season 3 Episode 4
Pandora is upset after her love-interest Thomas is deported so she decides to throw a party to cheer herself up, unaware Katie has spiked the chocolate brownies. This leads to everyone's behaviour - including her mum's - turning increasingly outlandish. Guest starring Harry Enfield and David Baddiel, with Lisa Backwell

 
Season 3 Episode 5
Freddie's feelings of isolation grow when his sister reaches the final of a TV talent show and he is blackmailed into sticking to a phoney story about their dead mother to help her cause. To add to his woes, the teenager is fed up of living in Cook's shadow - leading him to contemplate taking steps to turn his life around and put his desires first. Featuring a guest appearance by DJ Scott Mills

 
Season 3 Episode 6
Naomi believes she has everyone worked out and knows the truth about all her friends - until she is forced to face her insecurities when she goes head to head with Cook in the student elections. With guest star Ardal O'Hanlon, plus Lily Loveless and Kaya Scodelario

 
Season 3 Episode 7
JJ feels overwhelmed by the changes taking place in his friendship circle. His psychiatric clinic only gives him a fresh supply of drugs, and his mother appears increasingly worn out by it all. With Cook and Pandora's secret weighing heavily on his shoulders, JJ is grateful when Emily proves to be a trustworthy companion with whom he can share his troubles in his time of need

 
Season 3 Episode 8
Katie flaunts her new-found status as Queen Bee by inviting Effy to a party in the woods on the condition that she drives but does not bring Cook. Jealousy and rivalries create a tense atmosphere until the teenagers find magic mushrooms and decide to experiment. However, they soon realise they are not alone and terror strikes, but Effy sees an opportunity to follow her heart

 
Season 3 Episode 9
Emily is devastated when Naomi rejects her invitation to the ball, so she reluctantly agrees to accompany Katie, who plots to embarrass her sister at the party. Kathryn Prescott stars

 
Season 3 Episode 10
Cook takes a big risk on a steeplechase when he accepts a bet that could clear his father's debts, or cost him everything. Effy is forced to make amends for the pain she has caused her friends after exiling herself from the gang. Matt King and Morwenna Banks guest star

 
Season 4 Episode 1
Thomas New series. Thomas feels responsible for an accident that occurred in a club on a night out with friends, and after feeling alienated from his peers, turns to God and the African community. Cook enjoys a summer of debauchery, and Freddie discovers that love is taking him to the edge of sanity. Guest starring Pauline Quirke and Chris Addison

 
Season 4 Episode 2
Emily Emily and Naomi are called in for an interview with the police after they were listed as close friends of Sophia by her family, despite never meeting her. Freddie gets friendly with Effy upon her return, causing an angry Cook to assault a party-goer and get arrested. Starring Kathryn Prescott and Lily Loveless

 
Season 4 Episode 3
Cook Following his violent behaviour at the party, Cook finds himself in court facing a charge of GBH. While out on bail, he realises he has set a bad example to his younger half-brother Paddy, and feels humiliated when he is not only expelled from college but also sees Freddie and Effy getting intimate. However, the day before the trial, he gets a visitor at the Young Offenders Institution. With Jack O'Connell and William Long

 
Season 4 Episode 4
Katie finds herself increasingly tested as she juggles relationship problems with helping at her mother's wedding-planning business. A disaster ensues at an over-the-top Wag ceremony - but when she turns to Emily for help, even more problems are unearthed

 
Season 4 Episode 5
Freddie voices his concerns when his hedonistic lifestyle with Effy starts to compromise his coursework, and the two end up having an argument. Another disagreement ensues when he tries talking to his dad, so he turns to his grandfather for advice. Singer Will Young and Dudley Sutton (Lovejoy) guest star

 
Season 4 Episode 6
JJ falls for Lara, a cashier from his workplace at a confectionery wholesalers, but when he plans to ask her for a date, he finds not only his friends but also his mother believe he will be unsuccessful. After receiving advice from Cook, he feels ready to approach her - but encounters numerous problems in the process

 
Season 4 Episode 7
Effy leaves the psychiatric hospital to return home and make a fresh start, and tries to resume her relationship with Freddie - but the strict routines she has set herself create difficulties. Despite being stronger and more self-assured than before, her friends become concerned that something is amiss. Guest starring Hugo Speer (Echo Beach), Morwenna Banks (Saxondale) and Chris Addison (The Thick of It)

 
Season 4 Episode 8
Everyone The teenagers congregate in Naomi's house over the course of two days, trying to settle old scores and disputes as the host's domestic situation reaches a head. However, everything degenerates and the gang must face the adult world head on. Guest starring Kwame Kwei-Armah (Casualty) and Hugo Speer (The Full Monty). Last in the series