Miss Kinder is repeatedly mistaken for a student, Miss Fun-With-Numbers takes on a patronizing approach to maths, and Mark has gotten himself a girlfriend over the summer, much to the disapproval of Mrs Mark.

Mrs Hackvinda has employed Mr Capp's help to obtain the latest video game release, Mrs Windstone is unforgiving when it comes to overdue library books, Mr Rhomb has a strangely abstract view on art, and Mr Christopher has been promoted.

Nits are plaguing the school, and it's up to Mr Hart, Martin, and the Nit Nurse to fight the outbreak. Miss Presto prioritizes showing the class her magic tricks over teaching, and Kev struggles with the difference between push and pull.

The passing of Mr Barker leaves a vacancy for a new headteacher, prompting the arrival of child-repulsed Hillary Head. Mr Christopher teaches a lesson on trust, and Mr Barrowboy challenges the students to create a dish in under a minute.

Mr Christopher is granted permission to hire an assistant, Hillary Head announces a new healthy eating menu, despite Mrs Tucker's disgust, and Mr Schofield turns distributing test results into a game show.

Hillary Head is overrun with children so she calls in a fleet of supply teachers to help, Mr Capp tries to befriend even cooler teacher Mr Ladd, and Mr Qwerty introduces the class to the concept of the internet.

Career advisor Miss Dropitt advises the students one by one to quit following their dreams and settle for a "realistic" goal...like a career advisor. Meanwhile, Mark sends Mrs Mark to isolation, and Miss Dior-Durrant takes up vlogging.

There's a messy intruder in the school and site manager Dave is determined to catch them.

Mr Nasal suffers the consequences of his unfounded jealousy.

The staff and pupils prepare for the school photo, but the photographer is MIA.

It's Valentine's Day at Dockbridge High, but Mr Nasal and Miss Spray are still apart.

Not only the last day of term, it is also the day of Mr Nasal and Miss Spray's wedding!