Sex Education Season 4 Cast Guide - Netflix Tudum

  • Who’s Who

    ‘Sex Education’ Cast Guide: Meet Season 4’s Rambunctious Roster

    Dan Levy joins the series as a cult author in the show’s final chapter.

    Sept. 28, 2023

There are monumental changes ahead for Otis (Asa Butterfield) and everyone around him in the fourth and final season of Sex Education, premiering Sept. 21. Following the closure of Moordale Secondary, students are culture-shocked at their new school, Cavendish Sixth Form College. Even more so than Moordale, Cavendish is an incredibly progressive environment that prioritizes things like sustainability and daily yoga in the communal garden. It even has a popular clique who are held in high regard simply because they’re kind.  

With a new and unfamiliar setting also come some fresh faces, so let’s get you up to speed on who will be in attendance when the end begins. Think of this as your Season 4 yearbook.   

Asa Butterfield as Otis Milburn sits at a desk with his arms folded in Season 4 of ‘Sex Education’
Samuel Taylor/Netflix

Asa Butterfield

as Otis
About the Character

Otis was Moordale’s go-to student sex therapist, but now that he’s moved on to Cavendish College, it’ll be challenging to establish himself as the trusted expert on a new campus. While Otis is great at listening to clients, he tends to neglect the people he’s closest to. Sometimes his actions are self-indulgent, which can lead to fractured friendships and romances. He’s also in a long-distance relationship with Maeve, who is studying in the United States. 

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Gillian Anderson as Jean Milburn stands on her porch in Season 4 of ‘Sex Education’

Gillian Anderson

as Jean
About the Character

Jean is Otis’ mum. She exudes sexuality and confidence and is an observant, brilliant therapist. However, after enduring a complicated birth, she’s low energy, distracted, and disconnected from her newborn, Joy. “[Jean] isn’t coping that well with the reality of being a single mum again,” creator Laurie Nunn told Tudum earlier this year. 

 

Additionally, Jean takes on a new challenge, trading her typical therapy environment for a role as the host of a sex and relationship radio show.

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Emma Mackey as Maeve Wiley sits in a library with her hands folded in Season 4 of ‘Sex Education’
Samuel Taylor/Netflix

Emma Mackey

as Maeve
About the Character

Maeve is fiercely intelligent, and though she can come off as being tough, she’s complex, loyal, and kind when it comes to those who mean a lot to her. Having left Moordale for a big opportunity, Maeve is in the US living her dream, enjoying both the social and studious side of things in America — but she misses Otis. Maeve, more mature and levelheaded than ever, is determined not to end up back at the caravan park where she grew up.

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Ncuti Gatwa as Eric Effiong stands with a surprised expression in ‘Sex Education’ Season 4
Samuel Taylor/Netflix

Ncuti Gatwa

as Eric
About the Character

Eric is best friends with Otis. He was bullied at Moordale (and nicknamed “Tromboner” after getting an erection while playing his French horn), but at Cavendish College he’s invited to join the Coven, a beloved, popular group of kids. Eric is out and proud unless he’s at church, where he worries they won’t accept him. He’s extremely funny, always full of life, and ready to fully explore his queer identity with his new crew.

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Connor Swindells as Adam Groff sits at a desk in ’Sex Education’
Samuel Taylor/Netflix

Connor Swindells

as Adam
About the Character

When viewers first met him, Adam was Moordale’s biggest bully. When he came out as bisexual and started dating Eric, we got to see his kind and vulnerable side. Then, Eric broke up with him and Adam called it quits with school, trading a conventional education for a gig training dogs. A bit awkward, Adam has a deep need for fatherly love, though he won’t admit it.    

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Mimi Keene as Ruby Matthews sits at a desk holding a water bottle in Season 4 of ‘Sex Education’
Samuel Taylor/Netflix

Mimi Keene

as Ruby
About the Character

Once leader of Moordale's popular group the Untouchables where she was practically royalty, Ruby is now a fish out of water at Cavendish. She's catty and stylish and can be cruel, but her harsh critique of others comes from her own insecurities. She has a stressful home life and despite the designer bags and flashy car, she doesn’t come from a wealthy family. Ruby looks after her dad, who has MS. Beneath her hard exterior, Ruby is extremely vulnerable and complex.

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Aimee Lou Wood as Aimee holds a pair of jeans from her closet in Season 4 of ‘Sex Education’
Samuel Taylor/Netflix

Aimee Lou Wood

as Aimee
About the Character

Aimee is Maeve’s best friend and she’s as loyal as they come. She’s sweet, kind, nurturing, and can be a bit ditzy at times, but that’s what makes her lovable. Aimee was sexually assaulted on the bus and has struggled to fully process her trauma, but she’s on a healing journey and remains determined to reclaim autonomy over her body.

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George Robinson as Isaac Goodwin speaks to his classmates in Season 4 of ’Sex Education’
Samuel Taylor/Netflix

George Robinson

as Isaac
About the Character

Isaac is Maeve’s ex-love interest who lives with his brother Joe after his addict parents were deemed unfit to look after them years ago. Isaac is witty, blunt, and studying at Cavendish in hope of pursuing a career as an artist. He was in an accident that caused his disability, and he gets a laugh out of jokingly lying to people about how he ended up in a wheelchair.

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Kedar Williams-Stirling as Jackosn Marchetti stands outside at school in Season 4 of ‘Sex Education.’
Samuel Taylor/Netflix 

Kedar Williams-Stirling

as Jackson
About the Character

Jackson was Moordale Secondary’s future Olympic swimming champion but he gave it all up when his anxiety got out of control, and he realized the sport wasn’t his passion. While he’s had his share of admirers, he craves deep emotional connection.

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Thaddea Graham as Sarah “O” Owen stands at a podium in Season 4 of ‘Sex Education.’
Samuel Taylor/Netflix

Thaddea Graham

as Sarah “O” Owen
About the Character

O runs a sex therapy clinic at Cavendish College and is slowly but steadily building a dedicated client list. She’s an empath, full of insightful observations and helpful advice. She doesn’t really have a group of friends of her own, and she tends to keep her emotions close to her chest. 

 

“She’s just brilliant,” showrunner Laurie Nunn told Tudum about Graham’s performance. “That was a really specific bit of casting that we knew we needed to get right, because it had to be someone who could keep Otis on his toes. Otis starts at Cavendish, and quickly realizes that his ambition to start an ethical new sex therapy clinic has been thwarted, because there’s already a talented sex therapist called O on campus, and this becomes the catalyst for Otis’ journey in Series 4.”

 

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Dua Saleh as Cal Bowman stands outside of school in Season 4 of ‘Sex Education.’
Samuel Taylor/Netflix

Dua Saleh 

as Cal
About the Character

Cal is a quiet but confident stoner kid, who knows themself and what they want. They moved from America with their mom as a teenager and came out as non-binary when they were 14. They’re keen to stay friends with their ex, Jackson, as they had a strong connection, but he’s still hung up on them romantically. At Cavendish, they start to develop feelings for Aisha, one of the college’s most popular students. Cal started taking testosterone when they turned 18 and are hopeful that they’ll soon receive top surgery, so they can overcome their body dysphoria.

 

“We also spend time with Cal and their mum, Nicky (Andi Osho),” Nunn told Tudum of Cal’s journey in Season 4. “This is the first time we’ve been behind the curtain of Cal’s homelife. We get to understand more about Cal’s internal struggles and how they’re navigating conversations around their identity at home.”


Chinenye Ezeudu as Viv sits at school holding a tablet in Season 4 of ‘Sex Education.’
Samuel Taylor/Netflix

Chinenye Ezeudu

as Viv
About the Character

Viv is an intellectual superstar and incredibly ambitious. Even though she packs her schedule and is determined to attend an elite university, she remains compassionate, rational, and pragmatic. She is Jackson’s best friend.

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Dan Levy as Thomas Molloy stands in an office in Season 4 of ‘Sex Education.’
Thomas Wood/Netflix

Dan Levy

as Thomas Molloy
About the Character

Thomas Molloy is a famous author, and all his students are honored to attend his classes, including Maeve. He’s openly queer, dry-humored, and unconventional in his teaching style. He’s a strong advocate of tearing down his students and building them back up in his image — especially the ones with the most potential.

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Alexandra James as Aisha smiles in Season 4 of ‘Sex Education.’
Samuel Taylor/Netflix

Alexandra James

as Aisha
About the Character

Aisha is a member of the Coven, the popular group at Cavendish, and is deaf. Aisha enjoys fundraising and having a positive impact on others. She’s a cool nerd who’s obsessed with tarot, astrology, and the occasional gossip session. 

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Anthony Lexa as Abbi smiles in Season 4 of ‘Sex Education.’
Samuel Taylor/Netflix

Anthony Lexa

as Abbi
About the Character

Abbi is the leader of the popular group the Coven, and the queen bee of Cavendish. Everyone wants to be like her or be friends with her. She’s trans, confident, sunny, magnetic, generous, and loyal.


Felix Mufti as Roman smiles in Season 4 of ‘Sex Education.’
Samuel Taylor/Netflix

Felix Mufti

as Roman
About the Character

Roman is goofy and a great listener. He’s trans-masculine, has a wealthy, supportive family and got access to gender-affirming private health care when he needed it. Abbi and Roman have been together for a while and are the ultimate power couple.


Alistair Petrie as Michael Groff hides behind a wall in a hallway in Season 4 of ‘Sex Education’

Alistair Petrie

as Michael Groff
About the Character

Michael is Adam’s dad and the ex-headmaster of Moordale Secondary. He has a tense relationship with Adam, but since divorcing Maureen, losing his job, and living alone in a small apartment, Michael realizes that he needs to repair his relationship with Adam and start making amends for his destructive behavior.

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Samantha Spiro as Maureen Groff sits at a table in Season 4 of ‘Sex Education’

Samantha Spiro

as Maureen Groff
About the Character

Maureen is Adam’s mother and Michael’s ex-wife. She’s compassionate, caring, and kind, wanting nothing more than for Adam and Michael to reconcile. She’s living her best life: going on dates, redecorating the house, and going to martial arts classes.

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Lisa McGrillis as Joanna stands in a doorway with open arms in Season 4 of ‘Sex Education.’

Lisa McGrillis

as Joanna
About the Character

Joanna is Jean’s younger sister. She’s a drifter, always the life of the party but completely directionless. Joanna disregards responsibility and lives in complete denial of her traumatic past. She’s had lots of intense, but not serious, relationships which always end before she becomes vulnerable enough to truly let anyone in. She’s warm, funny, and loving when with her family. 

Joanna’s introduction will allow the audience to “discover more about Jean’s past and how she became the woman she is,” Nunn previously told Tudum.

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Hannah Gadsby as Celia in Season 4 of ‘Sex Education.’

Hannah Gadsby

as Celia
About the Character

The manager of a radio station in Moordale, Celia’s not a regular boss, Celia’s a cool boss, who also happens to be Jean’s boss after having hiring her to host a sex therapy-oriented radio show. When Jean struggles with balancing the gig and being a mother to a newborn, Celia offers support and a solution — even if the latter is a little imperfect.

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Jodie Turner-Smith as God appears on a bridge in Season 4 of ‘Sex Education.’

Jodie Turner-Smith

as God
About the Character

Who is this mysterious figure? Eric has multiple encounters with an enigmatic new character, both in his dreams and in reality. While at first Eric takes her for just another regular person, he eventually realizes: She’s God. And what’s more, She has a plan for him, beckoning Eric toward his destiny and guiding him to where he’s most needed.

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Jack Gleeson as Dodgy Mo stands in a doorway in Season 4 of ‘Sex Education.’

Jack Gleeson

as Dodgy Mo
About the Character

Dodgy Mo is a bedraggled stoner and a friend of Maeve's brother, Sean (Edward Bluemel). When Sean goes missing during a particularly emotional time, Mo seems like a good person to ask for assistance locating him. Unfortunately, he has little to offer aside from weed and video games.

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