Aquatic ecologist Zeb Hogan continues his quest to find and protect the world's largest freshwater fish in the frigid rivers of Mongolia. He will travel by plane, truck, and horseback to find the largest trout known as the Hucho taimen. This is not your everyday dinner trout. This monster can grow up to 6 feet in length and weighs up to 200 pounds.

Scientific buoys immersed in the abyss off the coast of the French Riviera enable us to make for the very first time a detailed scientific study of the largest bony fish in the world, the Giant Oarfish, the creature behind the myth of the Sea Serpent.

In this episode of Snake City, Simon and Siouxsie receive a terrified call after a large Black Mamba is spotted inside a potting shed. On arrival they are escorted into a dark room, filled with clay pots and paints. Hidden behind a large heavy cupboard is Africa's most feared snake - the Black Mamba. Simon and Siouxsie are at a severe disadvantage - they can't see the snake but the snake can see them! Simon and Siouxsie put their life on the line every day in their obsession to save snakes. It's a risk they are prepared to take.

Face to face with some of the world's deadliest snakes is all in a day's work for snake catcher Simon Keys and herpetologist girlfriend, Siouxsie Gillett. It is silly season in snake city. A cobra sprays its venom on target, an elusive mamba lies hidden within strike range and a rat nest causes a stir.

Snake catchers Simon Keys and Siouxsie Gillett race across Snake City to fish out a massive Black mamba from a pool, hand wrestle the largest cobra in Africa and face off against an angry neighbor to retrieve an exotic Boa constrictor.

Wild woman Siouxsie Gillet is a true snake charmer. Together with boyfriend Simon Keys, she rescues snakes from sticky situations. With an ever-growing tattoo collection, sporting her signature pink hair; it's hard not to notice that Siouxsie rocks! This program features the drama and humour of the series while highlighting some of Siouxsie's most epic captures. We'll witness one of her first calls to catch a speeding forest cobra, experience her love of pythons, and feel the tension when she bags her first Black Mamba!

In this episode of Snake City, Simon and Siouxsie receive a terrified call after a large Black Mamba is spotted inside a potting shed. On arrival they are escorted into a dark room, filled with clay pots and paints. Hidden behind a large heavy cupboard is Africa's most feared snake - the Black Mamba. Simon and Siouxsie are at a severe disadvantage - they can't see the snake but the snake can see them! Simon and Siouxsie put their life on the line every day in their obsession to save snakes. It's a risk they are prepared to take.

Scientific buoys immersed in the abyss off the coast of the French Riviera enable us to make for the very first time a detailed scientific study of the largest bony fish in the world, the Giant Oarfish, the creature behind the myth of the Sea Serpent.

National Geographic Television joins a rare scientific odyssey to explore the Canyon's entire 277-mile length and examine its mysteries.

Papahanaumokuakea Marine National Monument, encompasses the Northwestern Hawaiian Islands. A month long scientific expedition will journey to these remote waters to map the uncharted.

Matt takes on three dogs that are in real danger of losing their homes or their lives, including Moneypenny, a snuggly pug that has some severe bullying issues. A beautiful Australian shepherd named Whiskey strikes fear in his owners’ home, and Pax doesn’t bring peace to his owners, who have had to cut themselves off from the outside world.

Matt takes on two cases of dogs crippled by fear and instability in their lives. The first is a pack of bulldogs facing daily attacks within the home, and the second is Pax, a severely under-socialized pit mix. With the families forced to make their worlds smaller for their dogs’ safety, Matt steps in, hoping to be able to transform their lives.

Matt helps two dogs with wild backgrounds - Agedashi, a previously feral blue heeler with violent reactions to strangers, and Lou, a neighborhood street dog with an extreme reactivity to collars. With animal services cracking down on feral dogs, Matt must find a way to break through Lou’s fear of collars before he gets captured and put down.

Matt helps rebuild two families with jealousy and trust issues. Kai and Goober were once bonded brothers but now need Matt’s help to break up their life-endangering aggression. Frankie is a beautiful Chinese Crested whose co-dependent household has turned him from a beautiful lover into a ferocious bully.

Intelligent, cultured and deadly, the killer whale dominates every ocean on earth and as our planet changes, this top predator changes with it. They are elite, marine hunters with an extremely diverse diet including other apex predators like the great white shark. Killer whales pursue their prey like a pack of wolves and have multiple killing techniques.

The world's vast amount of beautiful beaches are often magnets for tourists looking for a little rest and relaxation. But some of the planet’s most paradisiacal beaches are also backdrops for some epically brutal battles between predators. Here, only the strongest survive.

Cougar expert Boone Smith tracks deep into Montana's Bitterroot Mountains in search of evidence detailing the competition between the two biggest predators roaming this stunning winter landscape. His goal: pinpoint the places where cougar-wolf conflicts most often occur by gathering clues about each creatures hunting, feeding and fighting behaviors.

Intelligent, cultured and deadly, the killer whale dominates every ocean on earth and as our planet changes, this top predator changes with it. They are elite, marine hunters with an extremely diverse diet including other apex predators like the great white shark. Killer whales pursue their prey like a pack of wolves and have multiple killing techniques.

The world's vast amount of beautiful beaches are often magnets for tourists looking for a little rest and relaxation. But some of the planet’s most paradisiacal beaches are also backdrops for some epically brutal battles between predators. Here, only the strongest survive.

The planet's lush jungle landscapes conceal a wealth of dangerous elements, including deadly predators that use an arsenal of remarkable skills to survive. We reveal the fiercely stealth creatures who lurk in the shadows of the jungles waiting to spot and kill their next meal.

Rare and remarkable instances of predation on sharks by a variety of species, capture by both daring photographers and unlikely bystanders, have given us new insight as to how the primacy of an apex predator can be challenged. We will analyze this growing body of footage with the aid of experts in the field, shedding light on how and why these events occur. Whether with talons, tentacles, or teeth, animals are hunting sharks all over the world.

Cougar expert Boone Smith tracks deep into Montana's Bitterroot Mountains in search of evidence detailing the competition between the two biggest predators roaming this stunning winter landscape. His goal: pinpoint the places where cougar-wolf conflicts most often occur by gathering clues about each creatures hunting, feeding and fighting behaviors.

Exploring the ways animals kill in the ocean.

Two of Africa's deadliest gladiators - hippos and crocs have lived side by side for millennia, but are they cozy bedfellows or arch-enemies? One is a hefty herbivore, the other is the most successful freshwater predator on the planet, so how do they manage to survive together in the same habitat?

National Geographic filmmaker Bertie Gregory travels to the gateways to the poles to film wildlife in two of the harshest environments on the planet: South Georgia Island above Antarctica, and Canada’s frigid North below the Arctic Circle. Surviving in these vastly different environments require cunning, persistence and the ability to adapt to a changing climate. This is the story of Bertie’s quest to capture these wild environments firsthand.

Intelligent, cultured and deadly, the killer whale dominates every ocean on earth and as our planet changes, this top predator changes with it. They are elite, marine hunters with an extremely diverse diet including other apex predators like the great white shark. Killer whales pursue their prey like a pack of wolves and have multiple killing techniques.

The winter snow has turned into torrential rain, bringing a flood of farms calls to Pol Veterinary Services. The vets, farmers, and animals alike are growing weary of the deluge of rain-related problems and there doesn't seem to be an end in sight. And as the waters continue to rise around the clinic, so do emotions when a family is faced with a heartbreaking decision about their beloved dog. In the pouring rain, Dr. Pol rushes out to Pohl Dairy to check on a normally docile dairy cow that is acting out of its mind. Could the incessant rain be affecting this cow as well? Meanwhile, Dr. Brenda races out in the rain on an emergency call to Myers Dairy Farm where a cow has stopped producing milk entirely and is rife with infection. Dr. Brenda must work quickly to get water into the cow; otherwise this cow runs the risk of dehydrating to death. With the endless rain and countless farm calls everyone seems to be reaching their breaking point, so Charles comes up with an unlikely plan to help his parents have a little fun and help raise their spirits.

Vets, calves and cats are all having a hard time after getting the cold shoulder from Jack Frost this winter. Farmers, livestock and pets work to adapt while Dr. Pol stays warm the only way he knows how by keeping busy. Dr. Pol doesn't let a little cold weather stop him as he fixes frozen teats, stitches up hard-hided pigs, and helps with the birthing of one huge calf.

In this episode, Simon and Siouxsie will be challenged in ways that will test the faith and trust they need to be a successful snake catching team. They encounter one of the most venomous snakes on earth, a very large black mamba. Capturing and bagging this deadly snake is about timing and precision.

In this episode of Snake City, Simon and Siouxsie receive a terrified call after a large Black Mamba is spotted inside a potting shed. On arrival they are escorted into a dark room, filled with clay pots and paints. Hidden behind a large heavy cupboard is Africa's most feared snake - the Black Mamba. Simon and Siouxsie are at a severe disadvantage - they can't see the snake but the snake can see them! Simon and Siouxsie put their life on the line every day in their obsession to save snakes. It's a risk they are prepared to take.

Intelligent, cultured and deadly, the killer whale dominates every ocean on earth and as our planet changes, this top predator changes with it. They are elite, marine hunters with an extremely diverse diet including other apex predators like the great white shark. Killer whales pursue their prey like a pack of wolves and have multiple killing techniques.

In this episode, Simon and Siouxsie will be challenged in ways that will test the faith and trust they need to be a successful snake catching team. They encounter one of the most venomous snakes on earth, a very large black mamba. Capturing and bagging this deadly snake is about timing and precision.

The winter snow has turned into torrential rain, bringing a flood of farms calls to Pol Veterinary Services. The vets, farmers, and animals alike are growing weary of the deluge of rain-related problems and there doesn't seem to be an end in sight. And as the waters continue to rise around the clinic, so do emotions when a family is faced with a heartbreaking decision about their beloved dog. In the pouring rain, Dr. Pol rushes out to Pohl Dairy to check on a normally docile dairy cow that is acting out of its mind. Could the incessant rain be affecting this cow as well? Meanwhile, Dr. Brenda races out in the rain on an emergency call to Myers Dairy Farm where a cow has stopped producing milk entirely and is rife with infection. Dr. Brenda must work quickly to get water into the cow; otherwise this cow runs the risk of dehydrating to death. With the endless rain and countless farm calls everyone seems to be reaching their breaking point, so Charles comes up with an unlikely plan to help his parents have a little fun and help raise their spirits.

Vets, calves and cats are all having a hard time after getting the cold shoulder from Jack Frost this winter. Farmers, livestock and pets work to adapt while Dr. Pol stays warm the only way he knows how by keeping busy. Dr. Pol doesn't let a little cold weather stop him as he fixes frozen teats, stitches up hard-hided pigs, and helps with the birthing of one huge calf.

Exploring the ways animals kill in the ocean.

In this episode, Simon and Siouxsie will be challenged in ways that will test the faith and trust they need to be a successful snake catching team. They encounter one of the most venomous snakes on earth, a very large black mamba. Capturing and bagging this deadly snake is about timing and precision.

Cougar expert Boone Smith tracks deep into Montana's Bitterroot Mountains in search of evidence detailing the competition between the two biggest predators roaming this stunning winter landscape. His goal: pinpoint the places where cougar-wolf conflicts most often occur by gathering clues about each creatures hunting, feeding and fighting behaviors.

The world's vast amount of beautiful beaches are often magnets for tourists looking for a little rest and relaxation. But some of the planet’s most paradisiacal beaches are also backdrops for some epically brutal battles between predators. Here, only the strongest survive.

The planet's lush jungle landscapes conceal a wealth of dangerous elements, including deadly predators that use an arsenal of remarkable skills to survive. We reveal the fiercely stealth creatures who lurk in the shadows of the jungles waiting to spot and kill their next meal.

Rare and remarkable instances of predation on sharks by a variety of species, capture by both daring photographers and unlikely bystanders, have given us new insight as to how the primacy of an apex predator can be challenged. We will analyze this growing body of footage with the aid of experts in the field, shedding light on how and why these events occur. Whether with talons, tentacles, or teeth, animals are hunting sharks all over the world.

Intelligent, cultured and deadly, the killer whale dominates every ocean on earth and as our planet changes, this top predator changes with it. They are elite, marine hunters with an extremely diverse diet including other apex predators like the great white shark. Killer whales pursue their prey like a pack of wolves and have multiple killing techniques.

The world's vast amount of beautiful beaches are often magnets for tourists looking for a little rest and relaxation. But some of the planet’s most paradisiacal beaches are also backdrops for some epically brutal battles between predators. Here, only the strongest survive.

Cougar expert Boone Smith tracks deep into Montana's Bitterroot Mountains in search of evidence detailing the competition between the two biggest predators roaming this stunning winter landscape. His goal: pinpoint the places where cougar-wolf conflicts most often occur by gathering clues about each creatures hunting, feeding and fighting behaviors.

From the deepest seas to the tallest mountains, animals continuously surprise us and prove yet again that when it comes to Mother Nature, there is always an exception to the rule. These animals go against the grain, whether cheating death or forming odd friendships- it's Animals Gone Wild: Surprisingly Human.

Matt helps two dogs with wild backgrounds - Agedashi, a previously feral blue heeler with violent reactions to strangers, and Lou, a neighborhood street dog with an extreme reactivity to collars. With animal services cracking down on feral dogs, Matt must find a way to break through Lou’s fear of collars before he gets captured and put down.

Matt helps rebuild two families with jealousy and trust issues. Kai and Goober were once bonded brothers but now need Matt’s help to break up their life-endangering aggression. Frankie is a beautiful Chinese Crested whose co-dependent household has turned him from a beautiful lover into a ferocious bully.

Matt helps repair two families who are on the brink of disaster. Newlyweds are faced with a heart-breaking decision when their rescue dog tests the strength of their marriage. Matt helps a reformed killer dog come to grips with his fear-based aggression in order to provide a safe and happy life for him and those around him.

Matt helps two beautiful but aggressive dogs open up to the possibility of hope and love. A recent widow is at her wits’ end when her grieving guard dog goes into a downward spiral, and a tight-knit family comes to terms with their crippling codependence in order to give its dog the social life he deserves.

Hollywood star Chris Hemsworth has a unique relationship with our oceans’ apex predator. A lifelong fascination born from years of living alongside them. First as a child, now as a prolific surfer at Byron Bay, near his home in New South Wales – one of the shark capitals of the world.

Shark Side of the Moon presents an unprecedented glimpse into the fascinating lives of hammerhead sharks and their surprising connection to the moon.

The hammerhead shark is one of the recognizable animals on planet Earth. But very few people know that it is also one of the most highly-evolved and specialized predators ever. Dr. Neil Hammerschlag and his team of researchers are setting off on a quest to learn more about this mysterious shark, as well as search for the most elusive of them all -- the massive Great Hammerhead -- a shark that can grow up to 20-ft in length and can weigh over 1000 pounds.

Hollywood star Chris Hemsworth has a unique relationship with our oceans’ apex predator. A lifelong fascination born from years of living alongside them. First as a child, now as a prolific surfer at Byron Bay, near his home in New South Wales – one of the shark capitals of the world.

Shark Side of the Moon presents an unprecedented glimpse into the fascinating lives of hammerhead sharks and their surprising connection to the moon.

CANNIBAL SHARKS pulls in two of the world’s leading shark experts to unpack and analyze the mounting evidence that shark-on-shark attacks happen a lot more than we ever realized.

All across YouTube viral videos abound of great whites and other sharks attacking boats with a ferocity and anger that has never been seen before. The question is why? Is this simply a case of more people having cameras to video behavior or is there something else happening? Dr. Mike Heithaus and PHD Candidate Sara Casareto set out to investigate what’s causing this clash between sharks and boats.

The hammerhead shark is one of the recognizable animals on planet Earth. But very few people know that it is also one of the most highly-evolved and specialized predators ever. Dr. Neil Hammerschlag and his team of researchers are setting off on a quest to learn more about this mysterious shark, as well as search for the most elusive of them all -- the massive Great Hammerhead -- a shark that can grow up to 20-ft in length and can weigh over 1000 pounds.

A routine drone survey turns deadly when Ryan Johnson, a marine biologist based in South Africa, films a humpback whale being attacked and strategically drowned by a Great white shark. This is a total perspective shift on a creature he's spent his life studying. To make sense of this event, Ryan follows Humpback whales on their migration, mapping their weak spots. He also takes a new look at Great White sharks. How do they become whale killers?

In Yellowstone National Park, several wolf packs reside and compete for territory and pack leadership. A successful wolf pack survives by keeping order, respecting the hierarchy and obeying the leaders. But among these packs, a dark wolf with an unusual approach appears. Sometimes a loner, often a Casanova, eventually a leader- his surprising recipe for success broadens the definition of "normal" wolf behavior.

A rare event between top ocean predators was captured on video in Florida: bull sharks attacking a great hammerhead. Dr. Heithaus and a team of shark experts launch an investigation pinning one against the other. They put experiments to the test to see what will happen when these top predators come head-to-head.

Hollywood star Chris Hemsworth has a unique relationship with our oceans’ apex predator. A lifelong fascination born from years of living alongside them. First as a child, now as a prolific surfer at Byron Bay, near his home in New South Wales – one of the shark capitals of the world.

Dr. Pol's need-for-speed is both a practical necessity and a life-long passion that started way back in Holland where he was a driving instructor! When he's not tending to sick animals he’s burning up the back roads of Isabella County. First stop is a farm where a desperate mare has been in labor for over two days. Dr. Pol and Charles rush to save mother and foal, but are they already too late? Next, the father-son duo race over to Marshall Farms for a few pregnancy checks but the Marshalls have a little something up their sleeves as well. The Marshalls are farmers by day, but by night they’re amateur racecar drivers. They are just days away from a big competition and they want to thank their favorite vet by giving him a chance to drive a victory lap after the race. Almost as good on the road as he is in the operating room, Dr. Pol can’t wait to get behind the wheel - of course driving will have to wait until the car is complete! As the Marshalls work to finish the racecar, Dr. Pol gets to work helping a cockatoo finds its feathers and fixing the stomach of one feisty cow. It's finally time for the race, but duty calls. Dr. Pol has to make a pit stop at the clinic when an emergency brings Pandora, a dog with a badly slit neck, into Pol Veterinary Services. Will Dr. Pol make it to the track on time or will his racecar dreams be left in the dust?

The Pol Clinic vets are up to their coverall collars in clients and the new vet cant start soon enough. When Dr. Emily accepts the position she gets a real Michigan welcome spending her first day out on farm calls getting her hands dirty with Dr. Pol. Dr. Emily may be able to take help with the workload, but Dr. Pol stays busy as he juggles a horse combating colic, a rabbit that can't hop to it, and a working dog named Stitches, with possible head trauma.

Lake Tanganyika, one of the largest lakes on earth combines two very different yet equally magical worlds: an untouched wilderness along the shores, home to chimpanzees, elephants and antelopes and a spectacularly diverse underwater universe. The lake shares many of the ocean’s characteristics. Glorious sunsets, occasional storms with terrifying waves and waters filled with sardines, colorful fish, crabs and even sponges.

South Africa is home to wild creatures that evolved to survive its fauna.To survive in South Africa, nature produces exotic fauna, including both giant and pygmy versions of common species to occupy challenging niches.

Hollywood star Chris Hemsworth has a unique relationship with our oceans’ apex predator. A lifelong fascination born from years of living alongside them. First as a child, now as a prolific surfer at Byron Bay, near his home in New South Wales – one of the shark capitals of the world.

Lake Tanganyika, one of the largest lakes on earth combines two very different yet equally magical worlds: an untouched wilderness along the shores, home to chimpanzees, elephants and antelopes and a spectacularly diverse underwater universe. The lake shares many of the ocean’s characteristics. Glorious sunsets, occasional storms with terrifying waves and waters filled with sardines, colorful fish, crabs and even sponges.

The vets and staff at Pol Veterinary Services deal with Michigan’s notoriously unpredictable spring season after a cold and wet winter. The first signs of nicer weather are beginning to be seen in the form of clinic cases and farm calls as the animals are getting outside, releasing their pent-up energy and feeling an urge to mate. Charles promises to embrace the season of renewal by making a commitment to get in shape but only when the temps turn warmer. Suddenly it's springtime in the middle of the mitten and there’s no time to rest for the weary clinic and a determined Charles.

The Pol Clinic vets are up to their coverall collars in clients and the new vet cant start soon enough. When Dr. Emily accepts the position she gets a real Michigan welcome spending her first day out on farm calls getting her hands dirty with Dr. Pol. Dr. Emily may be able to take help with the workload, but Dr. Pol stays busy as he juggles a horse combating colic, a rabbit that can't hop to it, and a working dog named Stitches, with possible head trauma.

A routine drone survey turns deadly when Ryan Johnson, a marine biologist based in South Africa, films a humpback whale being attacked and strategically drowned by a Great white shark. This is a total perspective shift on a creature he's spent his life studying. To make sense of this event, Ryan follows Humpback whales on their migration, mapping their weak spots. He also takes a new look at Great White sharks. How do they become whale killers?