Mr. Robson and Justine collect an American teacher, Martha Jordan, from the airport. Mrs. Keele cuts up her credit card and throws away the pieces, but Anna Wright cunningly reassembles them.

Anna has fun with Mrs. Keele's credit card, Justine's good intentions come to nothing, and Jacko tells Becky about his mum's mental deterioration.

Mr. Robson's romantic aspirations have a momentary knock back at Martha's Thanksgiving dinner, Anna locks Mrs. Monroe in the toilets and Jacko sets an aim of taking his sick mum to the seaside.

It's Sunday, and there's a car boot sale, football trials and a drama workshop at school. Jacko sells some precious belongings, while Arnie and Sam discover a suspicious trade in animals.

Arnie and Sam's investigation into the animal sellers lead them into trouble, all the males of the drama workshop quit, and romance is in the air for Martha and Mr. Robson.

Jacko takes his mum to the sea and learns some family history, Mr. Robson almost destroys his romance with Martha, and Jessica and her old public school friends accidentally eavesdrop on the Head's marital strife.

Anna gets involved in the "Animal Man" business, word spreads about Martha and Mr. Robson, and a light-hearted drama session leads to a serious assault on Jessica.

Paula attacks Jessica because of the rumour that Joe groped her, while Mr. Robson and Martha interrogate the boys to get the culprit. During a confrontation with Anna Mrs. Keele keels over.

Mrs. Keele recovers from her heart attack in hospital, Dennis photocopies Mr Parrott's Maths test, and Jacko spends time with his mother, but gets kicked out of the band as a result.

The school choir is resurrected. Work starts on a school brochure with photos being taken of the school. Arnie, Sam and Anna borrow the camera to get a further clue about the animal smuggling.

The school inspectors give Mr. Robson a worrying time. Arnie, Sam and Anna make a journey to Hertford and discover Animal Man's farm, but Anna can't keep herself hidden when she sees a puppy about to be drowned.

Arnie, Sam and Anna defeat the animal trader. The girls perform their "Bits and Pieces" drama for Mrs. Monroe who decides it's too risqué for public performance.

Dennis and Dudley accidentally damage the stage equipment used for the girls' play, but Dennis's shoe leaves a tell-tale imprint behind. Justine takes an old friend to a party, but witnesses an attack on the way home.

The girls find a way around Mrs Monroe's ban, and perform their feminist drama piece in a park.

Sam can't find a reliable location for the computer tennis tournament, Dennis reveals that it was Brian who assaulted Jessica and Robyn and Julie's second babysitting evening is no better than the first.

Anna is forced to join the choir, and surprises everyone with her talent. A school trip to East Germany is planned. Babysitting lessons are given by the school secretary.

Year Seven put pressure on Mr. Parrott's rapidly failing voice to get him out of the choir. Justine and Maria secretly record Martha's singing and replay it to the music teacher so that she'll go to Germany with Mr. Robson.

The computer game tournament ends and Sam wins, but the winnings are confiscated by Mr. Robson. Maria spends the night with a bloke she met at a party and has a huge row with both her father and with Richard.

Grange Hill goes to Germany for the choir competition. A trip to a youth club becomes an unpleasant experience: Jodie faces right-wing youths who resent the intrusion of the English, and Jessica gets drunk on Schnapps.

Josh's war memorabilia threatens an explosive end to the Germany trip, Mrs. Monroe treats her class on her last day, Martha decides she can't quit the U.S., and Justine and Maria leave their school days behind.

Jessica is unwell, and boyfriend Joe seems to have lost interest. Wayne has an air pistol, and finds that Kevin is a surprisingly good shot. Wayne wants to know how good he is with a live target, so they go to an animal sanctuary...

Jessica publicly dumps Joe and then collapses. Kevin has Wayne's air-gun, but Wayne chooses the Maths lesson to ask it to be returned. As Kevin takes out the gun, Mr. Davies enters and demands to see what's in everyone's bag.

Kevin accidentally shoots Sarah-Jane with the air gun. He doesn't tell the police whose gun it really is. Jessica goes to collect the results of her blood test.

Jessica is diagnosed with M.E, but has an offer to stay with an Aunt in California. Dennis uses this as a business opportunity - importing cheap jackets - but Arnie quashes the idea.

Julie returns to school from her time in Spain. Mrs. Maguire announces that she's pregnant. Poppy brings a precious photo to school, but Wayne trips her up, and it is smashed.

Just who is stalking Joanna? Robyn gets the blame for a mistake in allocating homes for the French Exchange scheme.

The sixth formers are paid to monitor bullying. The French exchange kids arrive, and Arnie takes a fancy to Edith - if only he can summon the courage to ask her to go to the disco....

Julie tells Robyn about her Spanish romance. At the French disco, there's a disagreement about the music, Robyn dances with Mr. Parrott, and the Year 9 peasants revolt against the high refreshment prices.

A clear up is done after the disco, Chris invents a fight to cover up his strict parents' limitation on his social life, and Julie is convinced to give a talk on bullying.

Mr. Parrott's late night casino visits are taking their toll on both his finances and his appearance. The Anti-bullying counselling starts and Lauren's first customer is Poppy.

Mr. Parrot's careless comment affects Julie's self-esteem. "Bring Your Daughter to Work Day" takes place: Jodie has a disappointing day. Rehearsals for Grease start, and Mme. Lefevre's daughter Cecile makes an impact.

Robyn's spends the evening at a casino and then spends the night on Mr. Parrott's sofa bed. Chris talks to his parents about his religious doubts, but Anna makes a surprise visit.

Miss Carver's class create an audio book, Robyn can't understand why Mr. Parrot has gone so cold, Christophe makes a sudden departure to Paris and Gabriel lets Cecile sing in the musical.

Christophe handles Miss Carver's detention class badly. Chris plans to escape his baptism by leaving home. He tells Anna he's going on a trip, and she surprises him by appearing at the coach station.

Chris and Anna head up to the Highlands but get lost when they get off the coach. A local woman rescues them, but they aren't the only people from Grange Hill in the area - Miss Carver is spending a holiday there.

Robyn calls at Mr. Parrott's house, but he's in no fit state for a tutorial. The net closes in on Chris and Anna, and they finally arrive at Chris's grandmother.

Mr. Parrott goes missing, and Robyn visits his flat, fearing for his safety. At the same time, his letter of resignation has landed on Mr. Robson's desk.

The Sixth Formers visit the Hologram Laboratory where Christophe kisses Julie. After writing nothing in the history exam, Josh walks down the corridor and then collapses.

Dudley's caught putting graffiti on the school wall, Denny sells advertising for the Grease production, and when Lucy has a roller blading accident, the unpopular Cecile steps forward to replace her.

There's a surprise for Robyn as Mr. Parrott returns to school. While the Grease show is performed, Mrs. Maguire's baby is delivered by Dennis and Lucy in the loos.