Isaac and Darnesh help Chester with his fire safety check, but Bell isn't happy when it interferes with his staff training. New teacher Mr Russell runs into trouble while Owen and Evan try to hide accidentally killing the school axolotls.
Reiss and Coco are overjoyed when they get the chance to visit their mum, but after-school detention proves to be a problem. Eleesha is excited about her and Fleur's "friend-i-versary" and Bell accidentally traps himself in a straitjacket.
Reiss comes into conflict with strict new deputy head Wrigley when she unfairly sacks Isaac. Meanwhile, the sixth formers stage a protest against Bell's strict dress code by wearing wacky outfits from the drama department.
Reiss is suspicious about Clinton's aversion to going to Mexico, and tries to find out the truth. Amber tries to get Isaac a pay rise - so that he'll have more biscuits she can snack on, and CJ wishes to go back to St. Cuthbert's.
Nunn's looking forward to telling Henry's mum just how useless her son is at parents' evening - but a shocking revelation ruins his night. Meanwhile, Eleesha takes a driving lesson, and Henry and Magnus get bound together by handcuffs.
Evan uses Scouts as an excuse to escape trouble with Mrs Morgan, but isn't happy when he actually has to go. Amber and Darnesh start a black market for chips when prices rise, and Nunn discovers Henry is surprisingly good at netball.
An unfortunate mix-up leads to Wrigley believing Darnesh is a master artist - so she asks him to paint her portrait. Nunn, Bell and Clinton go on a fishing trip with the kids, and Ingrid gets a job at her Aunt Val's salon.
Clinton finds the perfect birthday gift for Emily in lost property, but disaster strikes when he realises it was hers in the first place. Fleur gets a job as a receptionist, and the unlikely duo of Owen and Evan plan a party.
Darnesh decides Bell's dull autobiography needs a rewrite, and sets out to make it more flashy. Owen needs to learn how to be a good kisser for his upcoming date, and Reiss and Magnus face off in a locker-decorating battle.
Reiss spills batter mix on Coco's clothes, and Wrigley's searching for the kitchen vandal. Unfortunately for Coco, the only spare outfit available is Henry's Elvis costume. Amber has to hide the fact she has a library book 4 years overdue.
Violet is elated when she gets the opportunity to learn to play the cello - until Darnesh swoops in and takes her spot. Ingrid gets involved with Clinton and Emily's relationship, and Nunn is lumbered with the task of doing a fundraiser.
Clinton has to sneak an excluded Reiss into school to avoid trouble with Emily. Meanwhile, Owen and the gang go to support Eleesha at a university interview, and Nunn struggles when he loses contact lenses.
Can renting a swanky limo help Owen get a date for prom? Meanwhile, Reiss and Coco's mum could be home from prison - but is that really such good news?