Following an incident with a porcupine, a pack of dogs is in urgent need of Dr Oakley's attention. But the Yukon vet's night doesn't end there.

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Dr Oakley chases sheep, protects an ailing musk ox, and teams up with a superhero pig. She then reunites with Patches, a dog with a puzzling paw problem.

Project Kodiak: Casey immerses himself in grizzly life on Alaska's Kodiak Island, hoping for some top salmon fishing tips.

Few hunters in nature boast the power and majesty of birds of prey. Discover how they use powerful eyesight, talons and speed to survive.

Witness some of the deadliest battles in the animal kingdom as creatures clash to protect their young or pass on their bloodlines.

Donkeys, ducks, and dogs-from quirky to jaw dropping, Pol Vets see it all.

Dr Oakley performs a checkup on two scrappy lynx, and Sierra takes charge on clinic day. 7+.

Dr Ben and Erin assist a kitten with a dangly leg, save a St Bernard puppy in the throes of kidney failure and outfit a Bichon with some cool new shades.

The expedition team in Guadalupe spend the final day attempting their biggest coup yet: to produce a blood sample from a great white female. 7+.

Simon and Siouxsie throw their lives on the line to get a deadly snake out of a sofa. They also help a man who didn't know he was room sharing with a mamba.

Fridays are always busy, and more passengers means more problems. Today an air ambulance emergency, security breaches and illegal drugs need attention. 7+.

Join Dr Oakley as she treats an enormous bull with a split hoof, an aging elk, and her own family's pet pug.

In the wild world of nature's oddballs, the deadly and devious often come out on top. Survival favours those who think outside the box.

Discover how animals in the wilds of South America have adapted, growing large or small to maximise their chances of survival in a world of extremes.

Serene beaches provide the backdrop for epic predator battles as coastal creatures go head to head in a ferocious fight for survival.

Good Medicine: Jody hunts for waterfowl, Marcella goes fishing, Tig builds a memorial fence and the Apassingok siblings go on their first adventure together as adults. U.

Rookie Terje is in big trouble when he crashes Thord's truck, Eirik searches for a missing garbage truck and Bjoern rescues a forty-tonner which over-turned. 7+.

A podgy pig, a wheezy mouse and a bloated bunny all come into the clinic - but there's still time to throw a gender reveal party for a Galapagos tortoise.

The team investigates reports of man-eating freshwater sharks found in Florida's Indian River and more than 2,000 miles upriver in the Amazon.

Puppies have taken over the clinic! Six litters of playful pups need check-ups and the doctors work on a variety of leg issues.

Dr Oakley diagnoses a friendly ferret and performs surgery on a kitten with a bulging eye. Sierra attempts to pregnancy check a miniature cow. 7+.

Zeb investigates Thailand's huge population of large fish, and the reasons why this great Eden of aquatic giants is currently experiencing an alarming decline.

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Dr Michelle Oakley ventures to the Alaska Wildlife Conservation Center to relocate and examine two black bears.

Project Wolves: Casey examines the controversial wolf reintroduction at Yellowstone Park and ventures 'inside the pack' to create an intriguing profile of the park's apex predator.

Discover more about weasels and raccoons and their disproportionate ferocity, making them capable of hunting in almost all terrestrial ecosystems.

From miniature murderers to nature's biggest brutes, witness wildlife at war in these deadly battles for turf, dominance and the right to mate.

The PVS vets take on a stalled labouring Lab and an attacked pot-bellied pig, and attempt to re-home a friendly kitten.

The Oakleys head back to the Yukon on the longest day of the year, and there's plenty of work at Dev's farm to fill the day! 7+.

The rare behaviours of marsupials and birds highlight threats from climate change. Through intimate storytelling, it reveals the ecological importance and fragility of these landscapes.

With 11 sharks successfully caught, tagged and released, the team embarks on its longest, most dangerous voyage yet to track these incredible predators. 7+.

It's Simon and Siouxsie to the rescue when a brown snake has power station staff running for their lives. A whip snake gives Siouxsie a nasty surprise.

The work never slows at Sydney Airport, whether it's changing a wind sock, painting a runway at midnight or putting out a potentially catastrophic fire. 7+.

Join Dr Oakley as she treats a miracle moose, a Doberman puppy that was hit by a car and an unusually tiny patient.

Dr Zoo-Little: At the North Carolina Zoo, a gorilla has emergency surgery, vets examine a deadly rattlesnake and zoo keepers try to take blood from a lion.

Experts head into the unknown as they follow bizarre reports of a cave-dwelling, orange-skinned community of dwarf crocodiles, living in pitch-black darkness in Gabon.

South Florida is the only place on Earth that is home to both the American alligator and the American crocodile. Who is the baddest.

Strong Foundation: Chris and Nalu take to the seas, Marvin fixes his father's grave, John and Teresa build the foundation for their cabin and Joel helps his grandma. U.

Thord risks getting crushed when a runaway trailer threatens a main road, Terje's simple rescue gets complicated and Torstein and Isac help a truck that's overturned. 7+.

It's all going on in the exotic animal kingdom as Dr K and co help a dizzy hedgehog, a bird that can't breathe and a ferret with tooth trouble.

The team head to the Deep South on the trail of a huge catfish said to be able to swallow a man whole. Does it exist? And if so, can they catch it.

It's baby season and the vets handle everything from a mini dog with mega pups to the addition of another bundle of joy to the Pol family.

Dr Oakley meets a dog with a badly infected paw, as the team takes part in a golden eagles research project and help a cat who has eaten its own tail. 7+.

Zeb searches for migratory giants on an ultimate fish 'motorway' near Khone Falls in Laos. Can he discover their way upriver before new dams block their route.

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Follow vet Dr Michelle Oakley as she covers thousands of miles tending to the Yukon's animal population; this time aiding a bison.

Yellowstone Winter: With winter looming, Casey Anderson treks deep into Yellowstone to witness how the park's wildlife adapts to the unforgiving conditions.

Follow the lives of Zambia's most formidable predators. Audacious leopard Olimba has just won control of the Luangwa Valley. But can she hold onto it? 7+.

Nature gets nasty as the animal world goes to war. With survival and bloodlines hanging in the balance, the stakes are high for these ferocious fighters.

An amped up Angus sends Dr Pol airborne while pushy pigs, an energetic husky and a skydiving Santa keep the rest of the vets moving. U.

Dr Oakley diagnoses a friendly ferret and performs surgery on a kitten with a bulging eye. Sierra attempts to pregnancy check a miniature cow. 7+.

In the wild world of nature's oddballs, the deadly and devious often come out on top. Survival favours those who think outside the box.

The crew risk it all tracking tagged sharks in the Pacific Ocean, as a faulty engine, rapidly spoiling bait and storms threaten their mission and their safety. 7+.

As Simon and Siouxsie wrestle a 12-foot mamba out of a drain, the crew deal with a deadly cobra and a homeowner gets an unwanted visitor.

The imminent arrival of the Prime Minister of Singapore has security on high alert, while Duty Manager Mel is excited to escort his favourite popstar. 7+.

Dr Oakley treats a cat that swallowed a string, a pregnant reindeer with cancer and a drooling porcupine.

Polar Bear Opposites: The zoo hopes for a polar bear pregnancy, two endangered red wolves go on a blind date and a young elephant gets some unusual treatment. 7+.

Sierra Leone's chimps are struggling and the race is on to bring them back from the brink. A heartwarming look at life at the country's Tacugama Chimp Sanctuary. Features Dr Jane Goodall.

Follow the turbulent journey of a newborn elephant calf as it faces the challenges of drought, predators and humans during his first months in Kenya's Maasai Mara.

Stepping Stones: Daniel's children go fishing by themselves, Jody is joined by her daughter, Joel goes in search of salmon and Tig takes his son and nephew hunting. U.

Bjoern risks everything to rescue a tractor, Thord gets stuck in the mud while helping a truck and when a winch wire slips, Jo fears disaster. 7+.

A snapping turtle case stumps staff when it takes a strange turn. A goat causes clinic chaos, a beakless parrot flies in and a pet rat gets some new boots.

The team brave the icy waters and hungry bears of Alaska in pursuit of a run of the world's biggest salmon.

It's the dog days of winter at Dr Pols as dogs keep filing into the clinic with busted legs, bulbous cysts, overgrown nails and more.

Dr Oakley joins a cattle roundup at a ranch, where she grabs a lasso and tries roping a calf. Plus, she treats a goat, a sheep, a horse and a dog.

Zeb travels to Spain in search of the invasive wels catfish - a monster fish capable of growing over eight feet long, which is destroying the local ecosystem.

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Dr Michelle Oakley travels 3,000 miles to investigate a problem at Buffaloland Park. Plus, a miniature horse needs her urgent attention.

Growing Up Grizzly: Casey throws a big birthday bash for his pet grizzly bear Brutus, before introducing him to some new friends at the Montana Grizzly Encounter sanctuary.

Surrounded by marauding hyenas and armies of elephants, the trials begin immediately for seven lion cubs born during Zambia's wet season. 7+.

Killer footage reveals how some of the animal world's most dangerous fights break out between the same species. And there can only be one winner.

From brawling birds to hurting hooves, the vets swing into action - mending paws, jaws and even a down on his luck duck. U.

Dr Oakley meets a dog with a badly infected paw, as the team takes part in a golden eagles research project and help a cat who has eaten its own tail. 7+.

Deep in the vast American West lies a high, lonely land called the Colorado Plateau, which is home to an array of hardened critters, from the elusive mountain lion to resourceful coyotes.

Equipped with new technology, the men hope to capture female great whites. But could it be the males that hold the secret to Mexico's shark success? 7+.

Snake catchers Simon and Siouxsie spring into action when a rats' nest causes a stir. There's trouble when a venomous spitting cobra hits its target.

Baggage Manager Kevin has a rough day trouble-shooting a number of mechanical breakdowns, while security screening discovers a passenger travelling with a gun. U.

Dr Oakley scrambles to save a dog after it ingests human supplements, operates on a deer's suspicious lump and removes the eye of an alpaca.

Hiss and Hers: The zookeepers are kept busy by the birth of a white rhino, two young lions leaving home and two cannibalistic snakes going on some high-stakes dates. 7+.

Get up close and personal with one of Earth's most extreme predators. As the seasons change, so do bears' bodies, allowing them to endure the very harshest of conditions.

From the highest mountain rivers to the dark depths of the oceans, it's eat or be eaten for these underwater predators.

Answer the Call: Tig and his daughters hunt moose, Jody returns to her native village, Marvin goes fishing with his family and Daniel's daughter pursues her first seal. U.

Thord's skills are put to the test with the rescue of an excavator - but he's in double trouble when rookie Terje's reckless driving ends in disaster. 7+.

A rescued raccoon has a check-up and a lonely sugar glider gets a new diet. A gassy rabbit worries Dr K, along with a baby macaw that keeps fainting.

The team head to Malaysia and Borneo in search of voracious predatory catfish that have been rumoured to swallow monkeys, porcupines and monitor lizards. 7+.

When a wave of cases sweep through PVS, the vets bring their splints, glue, sutures and expertise to treat their wide variety of patients.

The team travels to a remote Alaskan island where they're shocked to find that the feral cat population has exploded.

Zeb faces the crocodiles and goes in search of Africa's biggest freshwater fish - the Nile perch - a voracious six-foot, 400-pound monster fish.

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Things take a dangerous turn when Dr Michelle Oakley heads to a cattle farm. Plus, a Bernese mountain dog gives birth.

Yellowstone Spring Trek: Casey returns to his wildlife hotspots as spring brings the animals back out. Meanwhile, in Montana, Brutus and the other creatures come out of hibernation.

It's a dangerous time for the pride. Rival males move in on the current kings, who will be pushed to their limits to protect their family and their territory. 7+.

Mums wage war to protect their young and a battle for territory turn toxic. Plus, some of nature's toughest scavengers clash in a fight for food.

Dr Nicole tends to her old beloved beagle and it's all hands-on-deck for a litter of 11 puppies. U.

Dr Oakley joins a cattle roundup at a ranch, where she grabs a lasso and tries roping a calf. Plus, she treats a goat, a sheep, a horse and a dog.

Documentary exploring the secret lives of squirrels. Having invaded the cities, these bushy-tailed critters now live side by side with us. But how much do we know about them.

The team head to Guadalupe Island, Mexico, hoping to land a great white on the cradle so that Dr Domeier can finally prove his theory that sharks go there to breed.

Simon faces his biggest fear as he tries to catch a black mamba. Then, a quest to save a spitting cobra proves a revolting test for his OCD.

The busy Christmas airport is thrown into jeopardy with the discovery of an unidentified white powder on board an incoming flight. U.

Dr Oakley transports a bull by boat and sees chinchillas for a cuteness check. 7+.

Giraffic Park: The zoo welcomes a timid, new giraffe to the herd as a pregnant bat prepares to give birth and devoted keepers care for an epileptic chimp.

A litter of wild dogs find their young lives on the line when a clan of hungry hyenas move in nearby.

The hungry Mwamba pride await the perfect moment to kill when a herd of buffalo move into their territory.

Homelands: John, Teresa and their daughters hunt seals, Tig and Louise help their daughters set a net, Joel upgrades his home and Marvin demonstrates how to harvest a deer. U.

A salmon truck crashes and sparks a night of havoc, as Thord and Bjorn attempt to rescue the valuable load. Plus, rookie Domenic embarks on a solo mission. 7+.

Staff race to help a pot-bellied pig that's gorged on poison and a bunny whose battle scars have taken a bad turn. A lizard scuttles in with a sticky problem.

Experts search for the biggest fish in the world to find out how they are coping in their ever-changing environments. They begin by searching for giant carp. 7+.

Dr Pol and the vets are kept busy by geckos, goats, cows and mini horses with everything from lumps and bumps to sneezes and coughs.

The Oakleys are back at the Reindeer Farm, but this time the herd is in rut and their raging hormones are making them aggressive and unruly. 7+.

Zeb goes in search of the paddlefish. Once teeming throughout the Mississippi and Missouri river systems, their populations have plummeted in the last century.

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Furry friends will do anything to help their best pals in need, like a dog who protected a sick cat after the two were abandoned.

Dr Erin removes mysterious mammary lumps from a hunting dog while Dr Ben repairs a calf's hernia. They also decide to adopt a Border Collie named Hank.

Otter-ly Ridiculous: A special bonobo gives the vet team a scare on the way to her annual exam, while two Asian small-clawed otters show off their x-ray training skills. 7+.

A pair of pups have problems when they provoke a porcupine. Add a feisty mini-horse and an unlucky pet pig and it's non-stop at Dr Pol's clinic.

Winter has arrived and fast-dropping temperatures mean Michelle Oakley has got her hands even more full than usual. 7+.

After leading a lynx kitten vaccination that turns into a pursuit in the underbrush, Dr Oakley checks in on two labs who got on the wrong side of a porcupine.

When three people are killed in the waters around resorts in the Red Sea in less than a year, scientists launch a pursuit to determine whether or not this is part of a growing trend.

Daylight hours are short on Norway's most treacherous roads, where the darkness makes the tow truck rescuers' jobs all the more dangerous. 7+.

Charged with keeping thousands of miles of roads open 365 days of the year, the job never ends for these two truck rescuers in the far north of Norway. 7+.

Snake-catching couple Simon and Siouxsie are just inches away from being bitten when they confront a deadly black mamba that's trapped in a roof.

Simon and Siouxsie risk it all to save a black mamba in a storm. Plus, a cobra launches a sneaky attack and a huge spitter squares up to a tiny dog.

Follow veterinarians Ben and Erin Schroeder as they race to save animals big and small across rural Nebraska while juggling the demands of family life.

Monkey Business: As a team of doctors rush to a leopard's side, a monkey gets a rare physical, birds take cover from avian flu and a newt species gets a second chance. 7+.

Rhino Reunion: As incredible friendships are forged, bonds are made between a pair of lazy lemur brothers and rambunctious wallaby roommates. 7+.

Experts investigate today's piranhas in the Amazon Basin in a bid to find out what the giant flesh-eating jaws of the ancient and terrifying megapiranha were capable of. 7+.

Simon and Siouxsie race to find two deadly snakes that have slithered into a child's room. They also help a dog that's got into a violent fight with a lizard.

Winter wraps up with Sarah learning to fish, Carl fixing heat, Oliver's new sauna and Curly battling a threatening tree.

As Mother Nature tries to take back the land, Port Protection residents work hand-in-hand to ensure the safety and success of the community.

Francis races to build new rocks for a sick octopus. But he's forced to keep his life-saving mission quiet as Mat orders everyone to help with a new pet project. 7+.

Mat faces a hard task creating an aquarium backstop for the Miami Marlins. As well as looking great, can he get it to withstand the impact of foul balls? 7+.

Dr Michelle Oakley treats a sled dog that's had a nasty run-in with a porcupine. The day takes a more positive turn when she tends to two Icelandic horses.

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It's an emergency! The vets of PVS treat a sweet little dog with an injured eye, pets with creepy crawling critters, and a horse injured by a truck.

While Animal Control shadow Dr Pol around town, the PVS vets treat a cat's leg wound and a German Shepherd who is so sick she can barely walk.

A rash of attacks in the Gulf of Mexico sparks a major investigation. The team studies these super-rare encounters from a shark's perspective.

Experts reveal how human interactions are actually changing shark behaviour and the many factors that confuse sharks into mistaking humans for prey.

From tiny starfish and pack-hunting giant squid to the infamous great white shark, check out the ocean's deadliest predators. Plus, the dark side of dolphins is revealed, too.

Every year, tiger sharks gather in big numbers in Maui. Why? Join a team of fearless shark scientists who will do anything to decipher this mystery.

From their massive size, strength and stamina to their finely tuned hunting skills and unrelenting will to survive, sharks have evolved to be the perfect predator. 7+.

Has a small island in the middle of the South Pacific become a drive-thru burger joint for the world's largest tiger sharks? Luring the giants to their boat, experts investigate.

Tiger Queen: Are you ready to meet a daredevil flying goats, adorable cheetah cubs, a cranky female tiger, a lethal king cobra and a rhino that paints?! 7+.

Polar Delivery: Meet an adorable baby Rhino, witness an amazing polar bear birth and comfort a rare bird named Marla 7+.

Discover the ancient landscape of northeastern Australia, the most biodiverse region on the continent, and meet the incredible species struggling to survive there.

Seldom seen and rarely filmed in their natural environment, discover the Lumholtz tree kangaroos - the ghosts of the north Queensland forests. 7+.

The series heads to crowded corals and stormy coasts as it explores the ocean creatures fighting to survive their constantly changing habitat. Bear Grylls narrates.

Bear Grylls narrates a spectacular look at life for creatures in some of the most brutal environments on Earth. From Oscar-winning cinematographer Guillermo Navarro.

The slightest mistake could prove fatal when Simon and Siouxsie encounter one of earth's most venomous snakes in a garage. 7+.

Sam ascends to a rotten boat roof when he and Squibb attempt to salvage an unwieldy and heavy mast.

Oliver, Carl and Matt fish with slinky pots for the first time and catch more than they bargained for.

The Living Colour team return to build more incredible aquariums. They begin by transforming a Volkswagen van into a giant novelty fish tank. 7+.

Ben is tasked to install two over-sized tanks in an Orlando mansion. Plus, the survival of a rare frog hangs on Mat building it the perfect terrarium. 7+.

At The Yukon Wildlife Preserve, Dr Oakley treats a young caribou that could go blind, as well as a mountain goat with a life-threatening injury. 7+.

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Dr Michelle Oakley risks everything to save a brown bear from drowning, then has to run to save her own life.

When Grizzlies Attack: Casey travels to Yellowstone National Park where he observes the survival techniques used by the resident grizzlies, from hibernation to preying on elk calves.

Young hyena Mizumu musters all his strength, intelligence and cunning for the biggest challenge of his life - finding a new clan. 7+.

Check out some of the most brutal and surprising battles in nature - ones where size doesn't matter, and no victory is guaranteed.

Beloved clinic house cat Tater falls ill and the team bands together to save him. Charles debuts a new look and Dr Pol treats wood-chewing steer. U.

The team travels to a remote Alaskan island where they're shocked to find that the feral cat population has exploded.

A team of experts risk life and limb to learn more about Earth's most-feared predator. Snapping back into action in Malibu, they begin by hunting young sharks. 7+.

Simon has a close call with a black mamba in the middle of the night. He also finds his first-ever snouted cobra, that's managed to hitch-hike to Durban.

Baby-Paw-Looza: Get your cute fix in with some of Zoo Tampa's most adorable babies! Cheer on Kazuki, the baby siamang, before seeing a wolf born missing a leg. 7+.

Follow the daily drama at Dubai International as its 60,000-strong workforce intercepts smugglers, makes emergency aircraft repairs and builds a huge new concourse.

The fair's in town and Dr Pol is busier than ever making sure his clients have healthy cows, sheep and pigs to show. 7+.

Dr Oakley treats a limping bison and a litter of puppies struggling to survive.

Simon and Siouxsie bring 25 baby rock pythons into the world and try to catch a black mamba.

Gaze into the realm of gulpers: animals who waste no time eating their prey, often swallowing it whole.

Examine the weirdest animals that hide deep beneath the soil's surface. From a worm exploding from the seabed to a miniature digger excavating miles of tunnel.

Just in land, the lush landscape conceals deadly predators: all eagerly searching for their next meal.

Against the Wind: The Indigenous Peoples of Alaska rebuild their communities after Typhoon Merbok. U.

As wild weather and traffic convoys cause havoc, Thord races to rescue stranded drivers. Plus, Ole Henrik takes the company's new truck on its first mission. 7+.

Dr K comes to the rescue of a chick that's survived a rat attack - just. A tortoise limps into the clinic and a hedgehog shows up with a prickly problem.

The search is on for some of Australia's most dangerous river shark species, including the huge and mighty bull shark and the rarely-spotted speartooth.

As urgent field calls test the PVS vets' resourcefulness, Dr Pol races to save a cow battling tremors and Dr Lisa wrangles an ornery sheep. 7+.

The team is saddened to see that Archer, the miracle dog that survived a fire, is back in the clinic after a dog bite left a gaping wound.

Zeb investigates disturbing reports of a mammoth sized catfish, accused of stalking, attacking and killing people in the Indian Himalayas.

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Problems arise as Dr Michelle Oakley arranges for two wild horses to be airlifted to a new home.

In the Carpathian Mountains, nature is being given a helping hand with the reintroduction of European Bison and the spread of the Grey Wolf.

Born in Zambia's Luangwa Valley, this litter of wild dogs has a lot to learn if they're to become the crack hunting team the family needs to survive.

Witness some of nature's deadliest battles as mothers risk everything to protect young, clans unite to take on rivals and species turn on each other for food.

An ice storm shuts down the clinic, but when treacherous weather leaves injured animals in its wake, Dr Pol and his team rush to the rescue. U.

The Oakleys are back at the Reindeer Farm, but this time the herd is in rut and their raging hormones are making them aggressive and unruly. 7+.

Gaze into the realm of gulpers: animals who waste no time eating their prey, often swallowing it whole.

The crew land two juvenile white sharks on their expedition, looking to discover how young sharks mysteriously arrive at adult aggregation sites once they mature. 7+.

Animal Families: Watch as Liliane the giraffe ventures out on habitat with her new family, before Hadiah gives birth to the newest member of the orangutang clan.

It's mamba season and these deadly snakes are playing hard-to-get in trees, boxes and even a fridge. Simon risks his life to save them.

Staff treat a litter of pigs that have lost their appetite. Meanwhile, Dr Brenda has a do or die situation on her hands when she meets an injured calf.

A behind-the-scenes look at hectic life at Dubai International. Crisis strikes the airport's 55-mile baggage system. Plus, 200 volunteers test the brand new concourse.

A hitchhiking forest cobra at a wedding keeps Simon and Siouxsie guessing.

Join Dr Oakley as she tries to outsmart a herd of bison and fights for the life of a cherished friend. 7+.

Much Ado About Puffin: The zoo is bustling as a gator needs blood drawn, a lioness needs her tooth extracted and puffin parents nervously wait for their eggs to hatch. 7+.

The Okavango Delta at the heart of Southern Africa's largest desert is one one of the most diverse habitats on Earth. Here, a look at life ruled by the pulsing of Africa's great flood.

Coastlines are born from colliding continents and ravaged by weather and currents. For the animals who live in these harsh environments, survival is tough.

Taken by the Wolf: As dark winter approaches, subsistence Alaskans use the waning daylight to prepare for the difficult season ahead. U.

Thord puts his life in danger to rescue one truck that skidded to a stop on the ice, while rookie Raido battles icy conditions to recover a fish truck. 7+.

Dr K meets an amphibian that's lost her mojo and a softshell turtle that's been struck by a car. A one-eyed parrot flies by for help.

Experts investigate sightings of 16-foot stingrays and whiprays thought to weigh up to 92 stone. Could reports of these huge fish be true.

From mares and cows to guinea pigs and tortoises, the vets are kept busy with animals of all different sizes.

As Dr Oakley assesses a reindeer herd, the team try to get past a donkey protecting a mini horse, before checking in on some therapy animals.

Zeb explores why so many salmon migrate to Russia's far east, and why a threat to this truly wild salmon sanctuary could spell the end of this anadromous fish.

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Dr Michelle Oakley gets caught in the middle of a brawl between two bear brothers. Plus, an injured horse fights back and an alpaca requires urgent attention.

Across Iberia, food chains and ecosystems are being restored allowing endangered animals, including the rarest cat in the world, to flourish.

The daughter of an alpha female, hyena Spotty is a princess. But in a savagely competitive family, she must cement her status quickly or lose her rank forever.

Witness pound-for-pound battles between some of the biggest, baddest and most surprising fighters in the animal kingdom.

A whirlwind of emergencies keeps Doc out on nonstop farm calls while his team of vets keep the clinic covered. U.

The team is saddened to see that Archer, the miracle dog that survived a fire, is back in the clinic after a dog bite left a gaping wound.

Examine the weirdest animals that hide deep beneath the soil's surface. From a worm exploding from the seabed to a miniature digger excavating miles of tunnel.

The team hook a great white off the rocky and barren Farallon Islands. But things take a dramatic turn and sanctuary staff suspend their permit. 7+.

Simon interrupts two mating boomslang snakes to rescue them from a stone-throwing mob. Can he prevent them both from slithering away.

Follow the behind-the-scenes drama at Dubai International. Cargo and construction materials go missing, causing chaos and hold-ups at one of the world's busiest airports.

Dr Oakley operates on an unusual mass and investigates a musk ox with a hair loss problem. 7+.

Running Otter Time: The vets treat seven pythons as the orphaned otter pups go to fish school and the keepers rush to help some arctic foxes. 7+.

David Attenborough narrates a stunning exploration of India's diverse wildlife, beginning with a look at life through the eyes of a newborn elephant calf.

David Attenborough explores life under the same canopies as Rudyard Kipling's Jungle Book, finding the rare Bengal tiger and monkeys drunk on fermented fruit.

Death Stroll: Challenged by weather, predator and policy, Alaskans survive and thrive on their native arctic lands. U.