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Teleshopping.

The vet visits two elks who show no sign of going into rut at Wayne Grove's El Dorado ranch, and also castrates two young stallions at Arnold Johnson's pasture. Plus, Michelle is called back from enjoying a visit to the state fair with her daughters when a dog needs emergency treatment at the clinic.

Witness how some of the most dangerous fights in the animal kingdom are between the same species, whether for territory, bloodline or survival. From top predators to the smallest insects, life in the wild is a constant battle - and there can only be one winner.

In the animal kingdom, males are often presumed to be the most dominant, but in the ocean, does this presumption hold water? Scientists search for answers to understand if the biggest and baddest sharks of them all are female. From the great white sharks of South Africa to the tiger sharks in the Maldives, scientist teams seek to uncover the ultimate rulers of the waves.

Highlights from the series featuring aquatic animals, including orcas and great white sharks.

It's fall in Michigan and the Pols are ready for Halloween! The candy bowl is out; the leaves are turning; and clients are in costumes. On this spooky episode, the vets treat wounded horses, a limping alpaca and a steer with a deadly urinary blockage.

The vet treats a stone sheep with a life-threatening suspected tooth infection, which turns out to be an infected jaw.

Life needs more than just brute force. Animals with a super-powered sixth sense can get the edge on prey, beat the elements and find food in unlikely places.

Seas and snow batter the Iberian Peninsula, creating unique habitats that allow species found nowhere else on earth to thrive.

As a female wallaby prepares to join the wallaby family, a record-setting lemur gets his eyes checked and a little hippo prepares for a big move.

With the Battle of Champions underway, the Reel E. Bugging takes a huge gamble to get ahead, when they try to cross the bar in horrible conditions. Meanwhile, the Northern fleet attempts to bounce back from their slow start using every tactic they can think of to close the gap with the Southern boats.

Simon and Siouxsie have to round up snakes that have invaded a university campus, a child's room and a family kitchen.

The vet races to save the lives of pets attacked by wild predators of the Yukon, facing a wolverine at the Kroschel Wildlife Park, and wrapping up the aftermath of a coyote attack that left a family dog with a bloody tail. Later, tragedy strikes when Michelle's goat is hurt in her own backyard.

Armed with Amazon-worthy fishing boats, Cyril and team hit the waters in search of the elusive, giant muturo.

The rock climber scales the remotest and toughest walls and peaks of Greenland. The first stage of Alex's epic expedition gets underway.

Staff face the challenge of transporting a 57st sick alligator to undergo surgery.

Simon has his hands full with a black mamba that does will not be caught, a cobra hiding in a room of old sacks, and a snake in a car.

In Port Protection, residents must rely on both brain and brawn if they wish to outsmart mother nature. Oliver and Breanna head out on their first bear hunt. Curly coaches Morgan through felling her first tree. Sam uses science to sweeten his planting soil. Mary constructs a new method to cook her fish.

The deadliest predators in the sea, from creatures that stalk coral reefs to hunters in the open ocean.

Dr Oakley goes in search of ibexes in the French Alps, and also treats a group of parrots and a tiny owl.

A young koala and his caretaker share valuable time, a rhino learns the ropes as he grows up at the zoo, and a Marabou Stork fights for her life.

Dr Oakley struggles to capture some wily coyotes, before treating a cherished cow, vaccinating a jet-setting chihuahua and treating an elk.

Teleshopping.

Michelle heads to Anchorage, where she checks on orphaned moose calves before they are released back into the wild, stopping to help a reindeer with a broken antler on her journey to the city. Plus, the vet works with Dr Riley from the Alaska Zoo on an arctic fox with a mysterious lump, as well as a coyote that needs to be neutered and a porcupine with bad teeth.

Watch as these animal mothers wage war to protect their young, and disputes over territory turn toxic. Join us as we reveal the tactics, techniques and weaponry used when animals fight for their bloodline and survival.

Animals that swallow their prey whole or use massive jaws to fight territorial rivals, including orange-throated pikeblennys, Humpback whales and Nile crocodiles.

Animals that have evolved deadly natural weaponry, including sharks with fearsome jaws, the hammer-like foot of the secretary bird, and scorpions with toxic stingers.

In the midst of cows taking over the parking lot, Dr. Pol rushes to the scene of an emergency to pick up a dog that was hit by a car. After an extensive search, the owners were identified, and Dr. Pol and the staff help the poor pup onto the road to recovery.

The vet races to save the lives of pets attacked by wild predators of the Yukon, facing a wolverine at the Kroschel Wildlife Park, and wrapping up the aftermath of a coyote attack that left a family dog with a bloody tail. Later, tragedy strikes when Michelle's goat is hurt in her own backyard.

Part one of two. Europe is covered in snow, forcing hardships on its winter wildlife including lynx, arctic foxes and wolves. Only the most resourceful can thrive.

Part two of two. Spring sees baby wildlife born across Europe, as parents teach and protect. Follow seal pups, geese, marmots and more as they strive to survive.

As spring blooms, penguin chicks dive into penguin pre-school, a sloth prepares for a big debut, and a caretaker trains to be a venomous snake handler.

Weeks into the Bluefin season on the Outer Banks, captains are desperate to catch. For Reel E' Bugging, their drive isn't just about the profit, it's about respect. While for Pinwheel, they haven't caught a fish and profit is everything. So, when bad weather forces the fleet to stay at the dock, they risk their lives hoping to catch one more then everybody else. Will they succeed or will they sink

Simon and Siouxsie recall some of their most dangerous encounters with black mambas.

Dr Michelle Oakley visits a caribou with a nasty leg injury, before having to put down one of the Yukon's smaller animals. Later, a donkey starts to wake up during surgery, and the vet must act fast to resolve the situation.

Cara Delevingne realizes a dream of accompanying Bear Grylls on an adventure. Sweeping Cara off her scooter and into a helicopter, Bear leads Cara up the mountains of Sardinia. At nearly a mile high in elevation, Bear shows Cara how to brave several heart-stopping obstacles, including pulling herself across a horizontal line suspended 200 feet in the air and rappelling down a dangerous waterfall.

Great feats of ancient water engineering from around the world, including hidden 25,000-gallon water tanks, manmade islands, and complex gutter systems.

It's winter in the Outer Banks where only the strong survive. This season the bluefin are bigger, more profitable, and harder to catch. Northern champions; Hot Tuna, Dot Com, and Pinwheel return to face their Southern rivals; Fishing Frenzy, Little Shell, and Reel E' Bugging to prove who is the best of the best. Who will end their quest as the ultimate champion of champions of Wicked Tuna?

Simon has his hands full with a lightning-fast mamba and an unidentified snake terrorizes a school, before Siouxsie handles the deadliest of the lot.

The residences come together, combining old wisdom with youthful strength to ensure the future of Port Protection. Sam, Carl and Troy build a vital log hauler for their future homesteads. Curly is hungry for some heart and liver, so he hunts the rainforest for a young buck. Squibb and Chris build a significant upgrade to their infrastructure. Oliver and Breanna continue on their quest to harvest a