Abbey Grove's new term kicks off with the annual swimming gala and headmaster Mr Fraser decides to pay homage to the fact the UK recently hosted the greatest show on earth, Splash, by ending it with their very own synchronised diving competition. Alfie and his class don't usually take part in the gala, but lured by a cash bet with deputy headmistress Miss Pickwell he decides to bribe them with a group trip to a restaurant and enter the event. The first day back is also a chance for Alfie to catch up with his girlfriend Miss Gulliver, but he's shocked to find out that he isn't in a relationship with her at all, and even more shocked to find out who she is actually dating.
Alfie is shocked by the arrival of a new teacher at Abbey Grove, Mr Schwimer and even more shocked to learn that he will be taking over Alfie's own class. Desperately upset that his class seem to be having a great time and actually learning proper, real life GCSE history with their new teacher, Alfie is even more unhappy when he finds out which class Miss Pickwell has given him instead. With Headmaster Fraser and Miss Gulliver both increasingly charmed by Mr Schwimer it is left to Alfie and Jing to uncover the truth behind this American imposter.
Abbey Grove is rocked by the news that deputy headmistress Miss Pickwell is dead and Alfie is left particularly on edge when her suicide note clearly lays the finger of blame on him after one of his class's pranks pushes her over the edge. Haunted by guilt, will Alfie be able to put her unquiet spirit at rest with the perfect memorial service? With Pickwell gone, headmaster Mr Fraser decides to advertise for her position with less-than-successful results, which may mean Miss Gulliver is offered the role full-time. But will the power change her?.
It is Valentine's Day and headmaster Mr Fraser has planned a special Abbey Grove 'Take Me Out' to help the shy kids find love. New deputy headmistress Professor Green is rubbing everyone up the wrong way, apart from Alfie's father, who happened to go to teacher training college with her. Alfie is desperately trying to persuade Miss Gulliver to come to dinner with him, but is distracted by some shock news from Chantelle. Will Gulliver turn up to dinner and who is Martin Wickers's surprise dinner date?.
Headmaster Mr Fraser has organised a special guest speaker for Drugs Awareness Day, much to Miss Gulliver's annoyance. Alfie's class is alarmed by the news that Stephen's parents want him to leave Abbey Grove. Can Alfie persuade Stephen's parents to let him stay or will his attraction to drugs councillor India threaten to jeopardise everything?.
Abbey Grove is plunged into financial ruin when headmaster Mr Fraser gives the Nigerian Minister of Finance all their money with the promise of huge returns on the investment. With Professor Green executing an austerity drive which sees the school pillaged of resources, Miss Gulliver thinks it's time to move on. Will Alfie come up with a plan to save the school and stop Miss Gulliver from leaving? And how will he react to the big announcement Professor Green is hiding from him about his father?.
The Abbey Grove Christmas Play is about to happen and with Miss Pickwell no longer around Mr Fraser decides Alfie is the perfect replacement to direct this year's production. Alfie's decision to write and direct a plot mash-up of Robocracker and casting Grayson as co-lead could end up being a disaster. Mitchell decides invite Alfie's estranged mother to the play.