With no village bobby in Aidensfield Tommy Unsworth and his motor biking friends seizes the opportunity to make a lot of trouble in the village. Even Aunt Peggy is upset that the bikers are trespassing on Lord Ashfordly's land upsetting the natural order of things by frightening the game away and leaving her traps empty. But when it will take a while to get at permanent replacement Miller organizes a stop gap. Thus PC Joe Mason moves to Aidensfield on a temporary basis while he awaits his transfer to the Met. Mason is very resourceful and a bit of a maverick, and his senior officers were more than happy to get rid of him. The villagers are not too crazy about him either. But Unsworth is not the only source of trouble around. A professional gang from Manchester is targeting country houses in the area stealing paintings, antiques and jewelery.

PC Mason discovers that being a village bobby does not always have something to do with police work when he gives Nurse Cassidy a ride to a farm and the farmer asks him to help getting a cow out of the mud. But he also gets some real cases when somebody nicks 12 shillings from the collection in the village church and a photograph goes missing from Ashfordly Hall. Young Charlie Prentice asks for directions to Ashfordly Estate telling Oscar Blaketon that she is looking for her father and she is convinced he is Lord Ashfordly. David Stockwell decides to make a will because he is afraid to leave a mess when he dies. Maybe that was not such a good idea after all.

Masked robbers stop a train just outside Aidensfield and get away with several mail bags containing cash and securities. The train driver Brown tries to stop them, but is gunned down and killed. The case is assigned to DI Ludlow, who is none too pleased to see PC Mason again. Especially since Mason has a lot of suggestions on how to catch the robbers and Ludlow has already formed his opinion on who is behind it. Mason on the other hand only wants the robbers to be caught because Brown leaves a wife and two small children, and wins DS Dawson over on his side. Aunt Peggy gets a letter from a solicitor telling her she is the heir of a distant relative and she is convinced there is a fortune in it for her. Even when she learns that her inheritance is a race horse in stead of money, because she reckons she will earn a fortune in prize money - that is at least until she sees the animal.

Sergeant Miller has a clash with three Australians when they graze his patrol car on their way to Grimedale Farm to do some sheep shearing for George Grigson. And Miller is not the only one having trouble with them. They are eating Gina out of house and home - or at least Aidensfield Arms - and Grigson's golden watch is missing when they have left the farm. Others also find their way to Aidensfield. Reverend Jamie Finn returns to collect his motor bike - and not the least to see Rosie again. Furthermore he has a suggestion that completely knocks her off her feet. Aunt Peggy is short of money and buys a brand new washing machine open up a laundry. But modern contraptions like that are complicated machines - especially for David. Miller has a word with PC Mason about his replacement, but Mason is not sure he wants to leave anymore. Rosie Cartright decides to go to Australia with the visitors when they return.

Billy Hudson falls off the Scarsdale Bridge and PC Bellamy is very unsympathetic towards his girlfriend Nancy because some years previously Billy and Nancy may have been involved in the disappearance of baby Julie Summers. Others seem to share his feelings because it turns out that Hudson was murdered, and soon Nancy's son Peter is kidnapped as well. Ossie Floyd leaves his old Rolls Royce to Bernie Scripps. The car is in a bad shape, but it will not be repaired for quite some time since Rosie has to help the Australian sheep shearers. But there may be more to the old car than meets the eye, because somebody is willing to pay a lot of money for it. Aunt Peggy comes under fire for distributing leaflets with pictures of naked people. But Lord Ashfordly's game keeper is sure he saw her at the estate at the exact same time.

Walker's permanent replacement PC Wetherby arrives and it is time for PC Mason's transfer to the Met, but Mason is not so sure he wants to leave Aidensfield. Furthermore Wetherby soon makes himself unpopular among the villagers. Nurse Cassidy suspects that young Jimmy Masters gets beaten by his stepfather George Masters. Also the boy's real father Max Philpott returns from Rhodesia to see him, and there is a rough and tumble between him and Masters at the Aidensfield Arms. Gina and Oscar Blaketon organize a quiz show at the pub to collect 200 pounds for a new dialysis machine. Not surprisingly Peggy Armstrong tries to cheat and is far from happy to get caught.

Everybody is shocked over Phil Bellamy's death, and especially his wife Gina cannot believe he is gone. After the funeral she says she has decided to go back to Liverpool to make a clean break from the past. Headquarters has agreed to let PC Mason stay in Aidensfield, and PC Wetherby, who blames himself for Bellamy's death, fills the vacancy at the police station in Ashfordly. A teacher from Brassington School on the moor is found dead in his home after an apparent suicide. From his headmaster Anthony Barlow PC Mason and DS Dawson learn that he suffered from a depression over the death of one of his pupils on a school trip, but Mason is sure something is not right. Unaware that he nearly hit a cyclist with his car old Arthur Chiltern drives on, but the cyclist Dr. Oakley wants him charged with reckless driving. Nurse Cassidy tries to persuade him to drop the charges. She succeeds with something else as well when the handsome doctor asks her out.

. Ralph Spurling has been burgled and wants Oscar Blaketon to find out which employee at the hotel he was staying at is involved in the burglary. PC Wetherby helped Lesley Ashton in a case back in Northallerton and now she is obsessed with him and turns up in Ashfordly with a suitcase. When he turns her down she accuses him of running her down with his car. Bernie Scripps goes to see Iris Grocott to collect his fee for her husbands funeral and she surprises him by inviting him to dinner and does not take no for an answer. They check in at the same hotel which Blaketon is investigating with the help of Alf Ventress. And staying in the romance department things are really heating up between Nurse Cassidy and Doctor Oakley.

Somebody paints a pentagram on the church door in Eltering and Rev. Peggotty is convinced that the church has been targeted for black Masses by followers of the dark arts. And he may be right because a few days later Kord Ashfordly's godson Charles Enderby is found beaten up and terrified in the church, and in the churchyard gravestones sprayed with red paint and overturned. Almost like the record cover of a band, Enderby once managed. Doctor Oakley has invited some colleagues over for dinner and Nurse Cassidy asks Gina to cook for them. One of the guests the psychiatrist Paul Hammond has heard of Gina's loss and wants to help her come to terms with her grief. But that is not what has been bothering her. She has just discovered that she is pregnant again!

Derek Gorman is mad at the police because he has lost his drivers licence for drunk driving. He claims that they set him up and he swears revenge to Sergeant Miller. The next morning the police station has been broken into and rummaged through. Later somebody steels a patrol car in front the very eyes of PC Younger. Is it Gorman or the Leeds gangster Jimmy Faye looking for Alec Fletcher, whom the police is hiding because he wants to testify against him? Lord Ashfordly is looking for a new game keeper. Oscar Blaketon and Gina suggest to Aunt Peggy in fun that she applies for the job and she thinks it is an excellent idea. Lord Ashfordly does not! PC Mason's past catches up with him when his old girl friend Doreen turns up in Aidensfield looking for work. After a broken marriage she is not uninterested in reviving the relationship.

Gordon Radford and Lord Ashfordly are not the best of friends. As a matter of fact Radford is not on friendly terms with anybody. He is Master of Ashfordly Hunt and when somebody vandalizes his study during the hunt suspects are plenty in number, but Radford suspects Lord Ashfordly and takes it out on him in a very physical manner. Aunt Peggy uses David's aniseed balls to lure the hunting party across her garden in order to claim a huge compensation. But she does not fool Oscar Blaketon. PC Mason is on the lookout for a car and Bernie has just the one for him. Low mileage and only one careful owner - a nun none the less, but Mason is more interested in a sports car owned by the late fighter pilot Ginger Wells.

Somebody breaks in at John Harper's cottage and swaps the old, blind man's money with blank pieces of paper. The only visitor Harper can think of is Albert Ross. There is nothing but trouble with Ross. All he thinks about is money and how much it will cost him when his men are not working. When the police cannot do anything after yet another accident at his farm the workers take matters in their own hands. Furthermore Nurse Cassidy suspects that Ross beats his grownup daughter Juliet for seeing the worker Josh. David spots a naked man running through the woods. Later he and Aunt Peggy see the man throw himself from a bridge. Only David's actions save him from drowning and now the man sees David as his guardian angel. When Aunt Peggy discovers his true identity she tries to cash in on it.

While Eva and James Knight of Holly Cottage nearly run PC Younger down when the brakes of their car fail, a young woman breaks into their home and paints Nazi swastikas and slogans on the walls. The vandalism is directed at Mrs. Knight who is Jewish, although only a few people know about it. It also turns out that their brakes have been tampered with. Lisa Barnes stays at the Aidensfield Arms while she researches her family history. Some research it must be as it turns out that she is behind the attacks on Mrs. Knight. She claims that Eva Knight is no Jew, but a Nazi war criminal and responsible for her parents' death. But is it really true? An old steam roller breaks down outside Bernie's garage and blocks the entire road. PC Younger promises Councillor Jowett to have it removed by the next morning, but that is easier said than done. Aunt Peggy solves the problem by buying the steam roller and expects Bernie to repair so that it can be sold as scrap.

Sue Padgett and Nick Payton burn a brand new fur coat as a protest against the fur trade. Payton is determined to make a name for himself as an activist in the animal welfare movement and uses the girl as a willing tool. PC Mason suggests they deprive Payton of the publicity he wants to sabotage his plans. Sid Bestwick and his wife Marge want their daughter Tina to meet young men and get settled, and Sid has a word with David Stockwell about it. Aunt Peggy thinks he hit the jackpot, but David is not so sure. The school girl Lynne Reynolds is about to give birth and wants to give her baby up for adoption. Nurse Cassidy has her hospitalized as a precaution and hopes to change her mind about the adoption because she does not want the baby to grown up in a home as she did. When Dr. Oakley disagrees, and Carol breaks up with him.

Jocelyn and Rupert Middleton's 17-year-old daughter Vivienne has gone missing. She has an American boyfriend called Bobby Wilson that her parents do not approve of. They think he is only in the country to avoid the draft for the Vietnam War. But Bobby has not seen her either. Someone steals a bronze sculpture from Sir Piers Radley's estate and another one from Lord Ashfordly. They have even taken his lordship's gates and he wants some action - now. David is cleaning up the shed and finds a metal detector. He gives it a good clean, a bit of oil and a new battery and is ready to go treasure hunting. At first Aunt Peggy thinks he is talking nonsense, but she changes her mind after a small demonstration.

15-year-old Natalie is caught shoplifting. She lives at Throckton Grange with her guardian, the famous prima ballerina Lady Victor, who has every hope of making the young girl a ballet star. She faints during her arrest and Nurse Cassidy is worried about her, because she is severely undernourished. When Lady Victor's representative Edward Wilson makes a complaint about some gypsies, PC Mason senses something is wrong and decides to keep a close eye on the Grange and its occupants. The editor of Ashfordly Gazette, Brian Parker, hires David to write the agony column. But Aunt Peggy is very displeased with it, mainly because she wanted the job herself. Geoff Younger is in love with the salesgirl Lucy, but is too shy to ask her out. Furthermore he starts sneezing every time he comes near her.

The young mother Julie is neglecting her two daughters after she met her new boyfriend Brian, who is a real troublemaker, and PC Mason and Nurse Cassidy are concerned for the well-being of the children. Mason especially has it in for the children's officer Clive Eames, whom he thinks does too little to protect them. Somebody is stealing lead from the churches in the area. They even manage to get away before the "watchful" eyes of PC Younger - twice - and Sergeant Miller is far from pleased. Gina is still afraid that something will go wrong with her baby like it did with Daniel, her and Phil's first-born child. To top it all Phil's 18-year-old niece Dawn has got in with the rough crowd and her father asks Gina to take care of the girl for a while.

A car crashes when the driver tries to avoid a collision. The driver is knocked unconscious and later dies. The car was stolen in Liverpool, and CID thinks the car may have been stolen for a crime, but apart from the name of the driver the police have only a small sketch to go on. Gilbert Hartley suspects that his wife Moira has an affair with another man and asks Oscar Blaketon for help. But Gina is away so he is busy in the pub and asks Alf Ventress to follow her around discreetly. Together they spot another car following Mrs. Hartley and assume it belongs to a private detective, Hartley has hired. It does not! Aunt Peggy wants to produce goat's milk and cheese and buys some goats at a sale. But the goats are not exactly cooperative in that department. On the contrary. They are Angora goats which are kept not because of their milk, but because of their coats of mohair. Unfortunately she only discovers that after she has sold them again.

DS Dawson tries to catch a drug smuggling gang with the help of PC Mason, but also has to fight the new DI, who does not like women in CID and blames her for every setback. To crack the case she leans on her informer to get information about the next shipment. Gina has started ante-natal classes and befriends the young girl Sally, who is expecting her first baby. But Gina is not impressed with Sally's boyfriend Jonny, who is not all he is cracked up to be. Far from as a matter of fact. Joyce Jovett's uncle has died and she put pressure on Bernie Scripps to give him the best services possible. But Bernie wants to call it off because he has to fix his broken down hearse first. Aunt Peggy fails to see the problem because Bernie also has an old horse-drawn cortège. But then again she wasn't around the last time the cortège was used.

Mick Revill has done time for armed robbery, but has kept his nose clean after his release from prison making money as a debt collector. But Neil Boon thinks he goes too far when performing his duties and ask the police to look into it. PC Younger has problems with his lack of authority and reluctantly accepts Revill's offer to train him as a boxer. PC Wetherby attempts to enter him in the upcoming police boxing tournament, but has his plan backfire on him. David gets invited to the centenary celebrations of his old school and Aunt Peggy is determined to make him go. But David doesn't want to especially after meeting one of his old class mates who has really made it big.

David is with Aunt Peggy on one of her 'nightly expeditions' when he sees a shooting star. Soon thereafter there's a big explosion and rumours of a meteorite crashing down in the forest. The police finds traces of a more earthly origin though. Nurse Cassidy finds a man lying semi-unconsciously with burns and blast injuries at the roadside and takes him to hospital. Sergeant Miller and DS Dawson are convinced that this is no coincidence and PC Mason goes undercover to investigate Larry Fowler, who is said to sell dynamite to armed robbery teams from the quarry where he is the manager. Aunt Peggy on the other hand doesn't mind having a rock from outer space falling practically into her - or maybe rather Lord Ashfordly's - back yard. Not after hearing that space rocks are quite valuable. And she does nothing to prevent David from thinking aliens have landed. On the contrary.

Big commotion in Ashfordly. The famous pop manger Stan Sparrow returns to his native town to marry his latest young star Cathy Dee. The next morning Sparrow is found dead in his room at the Aidenfield Arms. The police thinks that he was murdered, but who will kill a man who is already dying of leukaemia? Has it something to do with the memoirs that he was writing? PC Wetherby catches Aunt Peggy with ten cases of stolen rum and suddenly she suffers from a total loss of memory (very conveniently) when the PC tries to interview her. But maybe Alf Ventress can cure her. Or David since he may have won a fortune on the football pools and can't find the coupon. Young Ben informs PC Younger of a crime about to happen, but when the criminal is apprehended Younger is very reluctant to reveal his informant. Understandably since Ben's family name is Wetherby - as in PC Wetherby.

When old Elsie Gray dies unexpectedly PC Mason suspects foul play by the family doctor, but since Dr. Thomas is highly respected nobody else apart from Nurse Cassidy is willing to do anything about it. Aunt Peggy is upset because somebody has offloaded a lot of rubbish on her lawn. Some papers among the rubbish leads to the home of a retired magistrate. When the police won't do anything she takes matters in her own hands and returns the favour, so to speak. Gina's baby is in due five weeks, but she is rushed to the hospital as a precaution when she starts to bleed The doctors are certain nothing serious is wrong, but Gina understandably fears the baby will die like her first child Daniel.

Edgar and Angela Faussett have just moved to Aidensfield and according to Aunt Peggy he is rolling in money and she is quite a looker. But they are also causing PC Mason a lot of problems. He apparently thinks the law doesn't apply to him and rather wants to see Mason's back than his face, and she is so impressed with the handsome constable that she uses every excuse to see him. She also claims that her life is in danger. This of course doesn't go unnoticed by Carol Cassidy who more or less considers Mason her boyfriend. It's Oscar Blaketon's birthday and the villagers have prepared a big birthday party for him. David even wants to play a birthday song for him on the pub piano. He just has to learn to play the piano first. But there might be something else to celebrate instead: Gina goes into labour during the party and gives birth to a healthy baby boy in her room at the Aidensfield Arms.