The waiting room is packed at the Darrowby practice, but Siegfried seems more focused on catching his hard-drinking brother asleep on the job.

The return of lambing season brings a boost to Siegfried's spirits, but James, laid up in the surgery, is reminded of the harsher realities of a vet's life.

Nerves are frayed as Tristan's encounter with an "exploding" bullock leads to a lawsuit, and Siegfried's venture in guinea raising runs foul. Meanwhile, James is sent to assist "on of the biggest boozers in the business."

As the tractor threatens to do away with a way of life in the Dales, James battles to save a dying shire horse.

The Darrowby Show is a much-anticipated event for the whole community, except for the duty vet. This mixed honor falls to James this year.

While James struggles to cope with the procrastinations of the Bellerby family, Tristan succumbs to the charms of a millionaire shipbuilder's daughter with a penchant for lobster.

James gets a taste of the high life when he comes to the aid of a city vet, Granville Bennet, while Siegfried juggles the care of Mr. Wilkinson's awesome "colt" with the fine art of debt collecting.

The atmosphere is tense as James prepares to perform groundbreaking surgery. Meanwhile, Siegfried wrestles with a disinterested prize bull, and Tristan's hormones run riot over Darrowby's merry widow.

James becomes suspicious when the Farnon brothers -- usually keen cricketers -- "volunteer" him in their stead for the annual cricket match between Darrowby and Rainby.

Tristan may have finally found the right girl in Alice McTavish. Meanwhile, James struggles to save a dog whose death could trigger the end of the owners' marriage.

James concludes that the drawbacks of a vet's life -- long hours, fierce dogs and a cunning sow named Prudence -- pale in comparison to the rigors of making a speech to the Darrowby Youth Club.

Siegried turns on the charm to teach Tristan a lesson, while James, busy with calving, finds one farmer's traditional Yorkshire hospitality a bit hard to swallow.

Despite Siegfried's insistence that he relax and "cultivate the inner man," James can't shrug off the irritations that often make his professions a dog's life. Siegfried's inner man is cramming for the annual quiz that pits the men of Darrowby against the fearsome Women's Institute.

James is busy with tuberculin testing but is summoned to the Ministry of Agriculture when the test results don't quite add up. Siegfried has to deal with a dog owner who only believes in strict discipline in dealing with his dog. He also has to deal with dying sheep, but the owners may not have the means to save them. Helen gets a job as a secretary, but James isn't quite sure he approves. Siegfried, on the other hand, thinks it's a wonderful idea. Tristan is less than enthused however when he realizes he will have to take over Helen's duties in the partnership. Mrs.Hall tells Siegfried that she has to leave to help her brother, who is now alone to work his farm.

Siegfried bumps into Mr. Beresford, the manager of the local bank whose dog behaves badly in the car. Tristan woos the lovely Marjorie Simpson and Siegfried meets Sarah Raworth. James treats the elderly Mr. Bailey's dog who has developed a bad case of bronchitis and Siegfried criticizes James when he waives the fee. Siegfried, however, has trouble following his own advice. Tristan rescues a severely injured cat and then convinces James to treat him rather than put him down. Helen promptly adopts him and nurses him back to good health but is devastated when she learns the cat belongs to the Gibbons family. Everyone celebrates Tristan's birthday.

Mr. Biggins tells James about his cowhand, Ned Finch, who goes drinking every night and is drawn to the bright lights of the big city. All James ever sees is an amiable fellow having a quiet drink in his local pub. Mrs. Hall is all aflutter with the visit of Mr. Barge, the loquacious pharmaceutical representative. Mrs.Pumphrey is worried when her new boxer, Cedric, proves to be overly flatulent. James finds a perfect solution. Mr. Beresford's dog is still misbehaving in the car. Siegfried suggest a new sedative, but it unfortunately doesn't have the desired impact.

Tristan and Siegfried meet Roddy, a hobo and his dog who are passing through the area. Mrs. Hall needs to visit sick relatives for a few days and Tristan is assigned chief cook and bottle washer. He also has to do the spring cleaning, cook the meals and put in his time in the surgery. Siegfried is less than sympathetic when Tristan complains. Granville Bennett stops in wanting the vets to care for his dog, Phoebe, who needs an minor operation. He invites James and Siegfried to lunch the next day and James once again over imbibes. Helen practices her first aid skills on James.

Tristan has had a rather late night and Siegfried takes him to task over his bad habits. Tristan announces that he has a steady girlfriend, Deborah Mount and will reform his wild ways. Turns out Deborah's father doesn't know anything about the relationship and may not approve. When he does hear of it, he has serious doubts about Tristan's character. Tristan doesn't help his case with his silly pranks. James has several encounters with a street urchin, Wesley Binks, whom he'd earlier caught stealing. James nonetheless helps Wesley out when his dog contracts distemper. Siegfried reacts badly when the Weeting brothers tell him they are off to join the military.

James and Helen are about to celebrate their first wedding anniversary and Tristan suggests to James that they go to the Harlequin, a modest restaurant that opened recently. It turns out to be anything but and is in fact one of the poshest restaurants in the area. Siegfried starts seeing Margery Egerton. Tristan, now a free man since being forbidden to see Miss Mount, sets his sights on previous conquests. Siegfried and Tristan ask James to arbitrate when they both want the same evening off. James has to pay several visits to Mr. Bailes whose dog seems to take great delight in scaring the wits out of him.

The possibility of war is on everyone's mind with Helen preparing for the privations ahead and Tristan tasked to tape the windows in the event of bombing. Siegfried decides that they should conserve food and heating by eating their meals together, but Mrs. Hall takes his instructions to economize a bit too seriously. James treats Hamish, a sick dog who requires an operation and Tristan, who is tasked with overseeing his recovery, loses him. The vets forgo a posh evening out to treat a stray dog who has had an accident. Tristan is aghast at Siegfried's attempt to pair him with Deirdre Headingley, one of his crony's less-than-attractive daughters.

The vets visit a modern dairy farm and are left to wonder who benefits from the cold efficiency. Miss Westerman returns with her dog Hamish and Tristan tries to avoid her, given that he misplaced her dog the last time she him in the vets' care. She is concerned at the rumors that all dogs will need to be destroyed if war is declared but Tristan sets her mind to rest. The vets agree to spay a cat for a minimum fee, but find they may have gotten more that they bargained for. Siegfried treat Herbie Hinchcliffe's aging horse Dolly and becomes emotionally involved in the case when he has to put

Siegfried has become a bit horse shy given his recent experience with Dolly. James has to deal with the very unpleasant Ralph Beamish, an arrogant horse owner who continually ignores his advice. Siegfried visits a local pig farmer and fears his animals may be infected with foot and mouth disease. Mrs. Beck continues to complain about her with the vets bill and is now worried about how her cat might survive a gas attack should war be declared. Germany has invaded Poland and the British government has given Germany an ultimatum to leave or they will be at war.

Mrs. Hall is away visiting a cousin and James agrees to fill in for Stewie Brannon while he's on holidays. Siegfried and Tristan make the best of it but Tristan's culinary skills have not improved over the years. He does make an excellent bangers and mash, for every meal, everyday. James treats a severely injured dog and has a bit of difficulty with the local dialect.

The Darrowby Bell Ringing Society is suspending its operations for the duration of the war and they have one, final "meeting" at the local pub. James and Tristan go to the bell tower with not unexpected results. The vets have to deal with a series of dog poisonings. They soon identify the farmer responsible, but not before several more animals die. Siegfried treats Joan Clifford's dog Saxon, but the case has very specific implications for her. James treats Mr. Hanson's pigs but it's Mr. Hanson who is most entertaining in that he always speaks at the top of his lungs.

James treats Paul Cotterell's dog Theo, who has been losing weight and is diagnosed with Hodgkin's disease. James recommends that Theo be put down and Paul agrees. James doesn't realize the impact this has on Paul and the tragic results that ensue. James meets Lord Hulton, a hard working farm owner despite his aristocratic background. Hulton takes a liking to a horse that has wandered onto his property from the nearby military depot. At the Billings farm, James finds young calves who are wasting away. He thinks they have ingested an irritant of some kind, but the vets simply can't isolate it.