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Episode 1 Imelda comes to school with some hair dye and a 'hit list'. The newly acquired 6th form building leaves something to be desired.
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Episode 2 Mr. Griffiths takes Helen and Ziggy to the donkey sanctuary and lets them into a secret.
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Episode 3 Calley and Ronnie use their secret language, Vince shows Hollo a secret room, and Mr. Griffiths prepares for 'Operation Harriet'.
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Episode 4 Operation Harriet seems to be successful, but the arrival of the donkey has not gone unnoticed. Radio Grange Hill gains support from the staff.
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Episode 5 Roland negotiates with Mr. Griffiths for a larger common room, and more and more people are finding out about Harriet.
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Episode 6 Imelda reveals the secret of Harriet to Mrs. McClusky, and Zammo gets back together with Jackie.
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Episode 7 Ziggy and Robbie cause chaos while fetching a reel of cable, and Danny Kendall's father visits the school. Imelda lets Harriet loose, and she damages two cars.
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Episode 8 Vince and Hollo propose that the bottle day money is put towards helping Danny Kendall, and Radio Grange Hill gets a test run.
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Episode 9 Fundraising meetings are held. Imelda gets into a fight with Ronnie and Hollo is surprised to learn that Gonch has been dating Ronnie.
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Episode 10 Imelda finally takes her stubbornness too far, Gonch returns, and Jackie decides she'll forgo the barge trip and go with Zammo instead.
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Episode 11 It's the day of the barge trip. Who is the shadowy figure lurking in the bushes? Is there enough room on the barge to hold Fred's enormous wardrobe, and ego?
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Episode 12 More adventures on the Grand Union Canal, and Ant Jones gets sent home.
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Episode 13 Interviews are recorded for the radio. Mrs. Reagan isn't pleased to see her daughter riding pillion on Banksie's motorbike.
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Episode 14 Can Ziggy conquer his fear of heights to erect the banner? Jackie comes to school with an engagement ring.
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Episode 15 Gonch takes Harriet out for donkey rides in the park, and Cleaver wrecks the secret den.
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Episode 16 Banksie changes his mind about his work experience after meeting Lucy and Perry. Harriet the donkey falls sick.
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Episode 17 Gonch convinces Trevor that the school is haunted. A teacher-student meeting ends abruptly when all of the students' ideas are summarily rejected.
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Episode 18 The 6th form get their exam results, Trevor has a meeting with the 'Grange Hill Ghost' and Ant Jones can't please either his own St Joseph's team or his old Grange Hill friends.
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Episode 19 Julia starts spying for her father, and the school handbook continues to be misinterpreted as a protest.
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Episode 20 Helen and Georgina bid Harriet farewell, Zammo and Jackie go shopping for wedding outfits, and Fay has an unexpected encounter at the craft fair.
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Episode 21 Mrs. McClusky is angry at Mr. Bronson for the rulebook, Danny Kendall's return sparks a new feud with St Joseph, and Trevor finally pushes Mr. Scott too far.
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Episode 22 Radio Grange Hill stages a sit-in protest. Jackie and Zammo begin to have second thoughts about their marriage.
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Episode 23 Trevor Cleaver gets his comeuppance when he participates in an exorcism of the Grange Hill Ghost.
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Episode 24 After the staff versus pupils cricket match, Zammo and Jackie make a surprise announcement.