Dr. Michelle Oakley, a veterinarian in one of the most rugged environments on Earth.

Dr. Oakley and Sierra help all the animals affected by the devastating Australian wildfires, including kangaroos and koalas.

Dr. Oakley takes to the skies to chase some of the Yukon's toughest wild horses, and a kitten's unexpected pregnancy scare could force a tough medical decision.

Dr. Oakley fights to save a newborn reindeer calf and performs a miraculous surgery on a canine burn victim.

Dr. Oakley travels to a remote village to treat the local dogs and investigates what’s ailing reindeer at the Alaska Wildlife Conservation Center.

Dr. Oakley and her daughters rush to save a canine who’s ingested pills, then team up with Dr. Doyle to operate on a horse with a nasty leg infection.

In Alaska’s backcountry, Dr. Oakley has to castrate a Himalayan yak, sedate a sick lynx and, unexpectedly, help a hairless cat with a dangerous injury.

Dr. Oakley preg-checks twelve cattle then races to diagnose a sick German Shepherd, while Sierra ponders if she’ll follow in her mother’s footsteps.

Dr. Oakley helps a horse with a strange lump and deals with a bull that's losing weight.

Dr. Oakley investigates a cat's seizures; gets hands on with a reindeer’s antler; and tries to remove an odd lump from a French bulldog.

Dr Oakley treats a Sitka deer with a recurring limp, an alpaca-llama cross with an attitude, and guards the family dog from a wandering hound.

Dr. Oakley treats a limping bull bison and a dog with a mammary mass.

Dr. Oakley preg checks rabbits, helps a sore duck, and relieves a reindeer.

Dr. Oakley treats a chunky chicken and a calf that was attacked by a bear.

Ahead of Sierra’s departure for vet school, the team treats an emu, a dog with a bulging eye, and a reindeer with a cracked antler.

Dr. Oakley travels to Prince Edward Island to tackle a bison inbreeding problem, and then helps a horse with a fractured hoof.

Dr. Oakley traps a snarling wolverine to learn more about her ferocious species, but this girl is all bite.

An emergency cesarean section keeps Dr. Oakley up all night.

Dr. Oakley's wild cow chase; Sierra's Yukon chops.

The future of a reindeer herd is in Dr. Oakley's hands.

A cat's bladder problem puts Dr. Oakley in a tricky spot; rowdy bison need wrangling.

A horse's mysterious nosebleed urges Dr. Oakley to sniff out the cause.

A young reindeer with many ailments needs Dr. Oakley’s help to get into fighting shape.

While Dr. Oakley awaits a litter of puppies, she hits the road to treat a stubborn bison.

Dr. Oakley treats walking and breathing issues for a horse, tries to save a fox in peril, and performs surgery on a puppy.