Former Cast Class Dismissed is a British children's sketch comedy series created by Luke Beddows, Stephen M. Collins and Andy Potter.

[2] The show features an ensemble cast, similar to Horrible Histories currently consisting of Richard David-Caine, Vivienne Acheampong, Jason Forbes, Greig Johnson, Steven Kynman, Suhk Ojla, Luke McQueen, Kat Bond and Denise Welch and formerly Sophie Willan, Marvyn Dickinson, Thomas Nelstrop, Dan Starkey, Ellie White, Jamie Rose-Monk, Naga Munchetty, Susan Harrison, Sam Battersea, Velile Tshabalala, Harvey Virdi and Marie Lawrence.

The cast consisted of Richard David-Caine, Vivienne Acheampong, Jason Forbes, Greig Johnson, Steven Kynman and Kat Bond, Steve McQueen, Selom Awadzi and Denise Welch (who all joined in Series 5).

He has a romance with the equally physically repulsive (but more likeable) lab technician Miss Spray whom he marries at the end of Series 2 after which they both leave.

Mr Ladd - (Series 2) A briefly-seen, "cool" supply teacher who likes to break rules and do parkour rather than actually teach.

Kelly (Series 5) An extremely embarrassing mother who is obsessed with her son whom she nicknames Boo-Boo Bear and makes up excuses to visit him during the day.

Mr Alan (Series 4-) A Maths teacher who is slightly overenthusiastic about numbers, often singing songs and playing music about them.

However his positive mood evaporates when he objects for no clear reason to a perfectly correct answer from one of the students and sends him or her out of the room.

In Series 6 he takes on the position of Geography teacher, creating elaborate displays and scenarios to explain parts of his new subject.

Mr Gentley (Series 6) A mild-mannered, ginger-haired physical sciences teacher who, outside of teaching, is in a band called Scream Beast and performs heavy metal songs about the lesson's topic when the pupils get bored.

He takes his assemblies as if he were the CEO of a big technology company, calling himself "Teacher, Innovator" and can often be found with his less-than-helpful assistant Carol.

Mr Spenge (Series 5) A very easily confused science teacher who is always getting his words muddled up and accidentally getting covered in sticky substances and getting stuck to things.

Nadia Choudhry (Series 5) The lazy, Australian-accented, head of security who is constantly on the phone and shows no interest whatsoever in the student's problems, even if it's incredibly serious like the ceiling in the assembly hall falling down.

Joanna Clearwater (Series 5) A broadcaster who reports on Mr Krill's art classes and is obsessed with blue whales.

They always find a way to relate the lesson to their relationship, eventually forgetting about it altogether and embarrassing their pupils with their romantic scenarios before asking them to have a lengthy amount of homework on their desk by Friday.

Mr. Phillips (Series 6) An American former special services officer who creates elaborate scenarios to show the importance of maths.

The cast originally consisted of Richard David-Caine, Harvey Virdi, Jamie-Rose Monk, Marie Lawrence, Sam Battersea, Velile Tshabalala, Dan Starkey, Thomas Nelstrop and Marvyn Dickinson.

Magda - (Series 1) A permanently miserable, silent personal assistant to the spoilt socialite Whizz Pinkham who humiliates her every lesson.

She used to work in a call centre and teaches as if she still does - her voice alternating between excessive sincerity to an automated style and telling the students "your education is important to us".

Her ideas of fashionable clothing are quite ludicrous, as are her turns of phrase such as telling one student "You look like Taylor Swift riding dolphin from volcano".

Miss Presto - (Series 2) A geography teacher who spends more time showing the students magic tricks than she does teaching.

Mr Rhomb - (Series 2–3) An enigmatic Art teacher with bleached hair and glasses and a softly-spoken voice who seems to be modelled on Andy Warhol.

Mr Busk - (Series 3) A part-time supply teacher who pretends he is a living statue and will only teach the lesson if he is paid £10.

Bouncer - (Series 1–2) A security guard who hates Miss Kinder and will not let her into the staff room because he thinks she is a child and a liar.

She was appointed by Mr Christopher despite the other candidates being more talented and even he admits his decision was about wanting to have an assistant who "wasn't as good" as him.

Speaking with an Italian-American accent she appears be modelled on Marlon Brando's Godfather character and runs the library in a ruthless manner.

Miss Kinder is still having problems convincing people she is an adult, the new maths teacher turns out to be the square root of terrifying and Mark gets caught bunking off lessons.

Mr Christopher releases a charity single and Mark chooses to do a sponsored silence but finds it harder than expected when Billy embarrasses him in front of Marcella.

Mark finally plucks up the courage to ask Marcella out and Mr Christopher puts his reputation on the line when he tries to prove once and for all that he's the most talented person at Dockbridge High.

Flunked!, a one-off 17 minute continuation of the Dockbridge High story follows Emily, Billy, Tahj, Jasmine and Mark as they join the sixth form.