The BFFs see ‘green’ after an accident with a smoothie, ex-special agent Mr Phillips shocks the class as their new maths teacher, while Mr Alan battles with a new role as caretaker.
Biology teacher Miss Aviary tries to drink bin juice, and we meet wheeler-dealer Mr Kettering in home economics and embarrassing Italian teacher Mr Turtalli and his loving wife Nancy.
Headteachers Miss BFF and Miss BFF enjoy their first day, English teacher Mr Dahling unveils his own new book, and Dr Markov has a smashing time with a new invention in technology.
Maths teacher Mr Alan tries to control his number rage, Dr Markov unveils a new invention for cool haircuts, and Mr Dahling tries to teach about stories through the medium of cake.
Mr Kettering’s cake business gets off to a rocky start.
Linda and Miss Aviary cause a stink with their climate clean-up day, Mr Smorgasbord’s globehead goes viral, Dr Markov’s new bin goes berserk, and Scream Beast goes apocalyptic.
It’s an emotional day as Miss BFF and Miss BFF’s friendship is tested, Mr Turtalli and Nancy fall out, while Mr Alan and Mr Phillips settle their differences with a number battle.
Linda cracks down on sweets, Mr Phillips and Mr Alan clash over a flour bomb, Mr Smorgasbord wings it as he stands in for PE, and Mr Gentley’s Scream Beast fuels a sugar frenzy.
With the school closed, Miss BFF and Miss BFF conduct a staffing review, looking back at the best bits of the year to decide which teachers should stay and if any should go.
Linda oversees a day of drills and drama as teachers compete for the annual Quayside Academy fire drill trophy, and things get fiery as Mr Alan comes face to face with Mr Phillips.
When Kyle’s dad asks for his help to commit a crime, Kyle must decide between the future he has always wanted with his dad or the safety of the DG.
Candi-Rose suddenly doesn’t feel right in pink. Troubled, she goes on a journey of self-discovery to find out who she would have been if she had never changed her name.
Off to stay at a potential foster family home for the weekend, Sid’s mind is blown to hear about his background. However, when a difficult decision looms, Sid must face reality.
Determined to find out why May-Li is in such a bad mood, Floss leads a secret mission - but what she uncovers has huge consequences for the DG!
It’s May-Li’s last day in the DG, but Candi-Rose’s celebratory plans are upended as her mother returns seeking a dangerous reconciliation that threatens to change the DG forever.
The DG is unrecognisable with Doreen in charge, and Floss has had enough. She goes to war, leading a rebellion to save the DG, but as the fallout hits, alliances begin to split.
After Floss’s cowardly betrayal of the DG, she finds herself exiled and fighting to redeem herself, while Kyle faces a tough chat with his dad, and Taz meets newcomer Izzy.
Meeting Maisie, Taz finds a would-be kindred spirit as they embark on protecting the local otters. However, as they become friends, Taz finds out that Maisie isn’t who she says she is.
Discovering how to get good karma, Floss faces the incredibly tall task of making good for all her past mistakes. However, Wes, under the influence of Jay, is getting drawn to payback.
Recovering from an injury, Jay must answer questions about his future that take him out of his comfort zone, while Sid’s hunt for an alien to land in the DG has surprising results.