Julian rushes to an emergency at Jackie's alpaca farm, where a new mum desperately needs his help - but rural North Yorkshire isn't always the best place for driving when time is of the essence, and Julian gets stuck behind not one, but two tractors. There's a glimpse of what lockdown life was like for Steve and Jean, whose daughter Sarah kept a video diary and, with things returning to normal, Peter returns to the Greens' farm, where there's now lots of veterinary work to do.

Julian comes to the aid of a cow that is unable to stand up due to a condition called milk fever, caused by calcium deficiency. One false move in the treatment could put the animal's life in danger. Peter works to save the life of a three-week-old kitten with pneumonia. A Chihuahua has a worrying lump that requires surgery, a goose acquires a mating injury from an overenthusiastic partner, and a horse is not going to sit back and allow itself to be castrated.

A special episode to mark International Dog Day, in which Julian faces the challenge of having to perform surgery on his own four-legged friend Emmy - who is not too keen on needles. Peter removes a tumour from a Great Dane's leg, and a spaniel is rushed in with her side ripped open on a barbed wire fence. Julian pays a visit to a sheepdog whose broken leg he fixed with a metal plate - and which he now has to take out again.

A one-ton bull needs a foot trim, but is reluctant to lie down for the procedure, so Peter has to approach its feet very carefully to avoid his patient falling on him. Julian and Katy operate on a beagle with damaged ligaments, and a cat undergoes a caesarean section - a procedure that is very rarely used on feline patients. The Greens release their calves and donkeys into the field together for the first time, and a tortoise displays a loss of appetite.

The vets treat some of North Yorkshire's more exotic residents, including Amadeus the alpaca, whose owner Christina found him with a stick in his eye. Julian Norton knows he probably would not survive an operation to remove the eye, and the kindest thing might be to put him to sleep, but he is hoping to find another solution. Peter Wright greets a familiar face from Down Under when a baby wallaby comes to the practice a little down in the dumps.

Julian has to help a ewe through a difficult birth in the middle of a field in the rain, while Peter performs an emergency C-section on a heavily pregnant shih tzu. A male goat presents a serious problem for its owners when it impregnates all the females in the pen, a cat undergoes emergency eye surgery, and a calf is in urgent need of its mother's milk.

Julian has to deliver the biggest calf he has ever encountered, while Peter has to perform testicular surgery on a show dog that may bring a premature end to his performance career. A Clydesdale horse that recently needed foot surgery now also needs dental treatment - and the specialist equipment Candela uses for treating teeth is too small for the massive animal.

Roger and Rob brave a reindeer's fearsome antlers to examine a painful-looking lump on its eye. Julian arrives at an alpaca farm just in time to witness the birth of one baby and treat another that was born with deformed legs and is struggling to walk. A couple struggle to afford a hip replacement surgery for their puppy, but Julian might have a more affordable solution, and the Greens' newborn calf is not looking healthy.

Peter tries to save a lamb that was badly injured during birth. A rottweiler locates a bag of class A drugs - but his owner is more concerned that he has eaten another bag. Anne discovers that wearing glasses can create problems for a vet, a one-week llama takes a turn for the worst, and a difficult birth leaves a cow struggling to feed its calf.

Julian heads to the historic Harewood House near Leeds to check on a group of goats that are moving to a new enclosure, but catching them proves quite painful. Peter heads over to lend a hand when a young farmer struggles with a tricky lambing, while Caroline and Ben arrive at the practice in Boroughbridge very worried about their old Jack Russell, Scamp. He's jumped off a stile and badly damaged a ligament in one of his legs.

Julian revisits an alpaca that he has treated through two previous complicated pregnancies, and who now needs help once again with a third difficult birth. Three cows need dehorning for the safety of the rest of the herd, while a pregnant sheep is rushed to Huddersfield's new emergency animal hospital. The owner of a German shepherd fears a lump on the dog's neck may be cancerous.

The owner of the famous farm in the middle of the M62 fears his cows have TB - and if even a single animal is diagnosed, it could prove disastrous for the rest of the herd. Julian rushes to the Taylors' farm to treat a sheep that has prolapsed days after giving birth, an eight-week-old shih tzu puppy needs surgery for a hernia, and Peter and Matt work together to castrate a goat.

A cow needs urgent attention after suffering a serious leg wound that leaves the bone exposed - but it is not clear if anything can be done to save the animal. A dog is brought in to surgery with a lump that is making it hard to walk, a hedgehog's foot is operated on, and five girls are worried about their pony, whose eyes have begun to swell up.

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Peter carefully examines a boar that is off its food, a rescue dog brought over from Spain undergoes surgery on a painful eye condition, and Rodney invests in an unusual device for administering medical treatment to his sheep - but neither he nor Julian know how it works and the sheep seem less than keen. A rare cattle breeder waits for the pregnancy test results on his Jack Russell

Julian investigates when a pregnant cow delivers an afterbirth but no calf, while Peter and Matt compete to see if modern or traditional pregnancy tests are more reliable. A German Shepherd puppy belonging to a woman who has recently lost two dogs is lame and in pain, requiring delicate keyhole surgery to remove a fragment of bone.

Peter provides urgent dental treatment to his niece's horse, while Julian visits a group of vets in training to pass on what he knows about treating farm animals. A ewe in a difficult labour is rushed into hospital, but Matt and the other vets fear it may not be possible to save either mother or lamb. Vets from West Yorkshire attend a special celebration of the 50th anniversary of James Herriot's first book.