Congratulating the new Orangutan Jungle School graduates, who aren't all spring chickens; following the convoy to the release site, where the team bids their friends a poignant farewell; enjoying the celebrations as Molly and Bumi move up a grade.

Jimmy and Jenny Desmond and their team are at breaking point, with 38 chimps to look after; losing one of them to illness leaves the team more determined than ever to build them all a new sanctuary where they can live like wild chimps.

Lizzie heads north to tag sharks and witness first-hand the slow disappearance of sea ice; she does time in bear jail with polar bears who are caught raiding a town for food after their hunting grounds diminish.

Gordon Buchanan must overcome his own fear, black bears have a dangerous reputation and attack more people than any other bear in the world, but once he meets Lily, a tolerant bear, mother of Hope, Gordon feels heartbroken.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

A fawn in need of CPR interrupts the annual fox release; the owls and a seal make great strides.

The team races to save a raccoon covered in oil; a silver fox recovers after a vehicle collision.

Hope Swinimer rescues, rehabilitates and releases thousands of animals each year, while struggling to make ends meet; she is driven by her compassion and belief that every animal matters.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

A fawn in need of CPR interrupts the annual fox release; the owls and a seal make great strides.

The team races to save a raccoon covered in oil; a silver fox recovers after a vehicle collision.

An introduction to some of the big characters including "class clown" Valentino and "Big Boy" Beni; an emergency arrival of teenage mom Clara and her baby Clarita; vets round up the older orangutans, who are now ready to be released.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

Winter in Marakele National Park is one of the scarcest, but also most plentiful, times of the year; looking at how a giraffe's demise becomes a source of life for the region's vultures, who depend on the decaying flesh of animals like these.

Cape Town, South Africa is home to twenty types of frogs, but many are threatened by urban development; following western leopard toads on their tenuous journey to breed in the city's shrinking wetlands.

Once superabundant, African Elephant populations have declined drastically due to hunting; getting an in-depth look into the lives of these powerful land mammals, and seeing what parks like Addo and Tembe are doing to preserve their future.

Surviving the African savanna requires guile and teamwork for species who live in packs; following a day in the life of African wild dogs and dwarf mongooses to see how they rely on their tight-knit families to overcome the challenging landscape.

Jimmy and Jenny Desmond and their team are at breaking point, with 38 chimps to look after; losing one of them to illness leaves the team more determined than ever to build them all a new sanctuary where they can live like wild chimps.

Lizzie heads north to tag sharks and witness first-hand the slow disappearance of sea ice; she does time in bear jail with polar bears who are caught raiding a town for food after their hunting grounds diminish.

Gordon Buchanan must overcome his own fear, black bears have a dangerous reputation and attack more people than any other bear in the world, but once he meets Lily, a tolerant bear, mother of Hope, Gordon feels heartbroken.

Lizzie gets to know Fera, the Queen of the Pantanal, as she teaches her rambunctious cub Simba some essential jaguar skills, including how to climb trees and hunt for dinner.

The wildlife hospital is swamped after a major flood crisis in Brisbane.

An operation for a critical koala and rainbow lorikeets create chaos.

Lizzie gets to know Fera, the Queen of the Pantanal, as she teaches her rambunctious cub Simba some essential jaguar skills, including how to climb trees and hunt for dinner.

The wildlife hospital is swamped after a major flood crisis in Brisbane.

An operation for a critical koala and rainbow lorikeets create chaos.

An introduction to some of the big characters including "class clown" Valentino and "Big Boy" Beni; an emergency arrival of teenage mom Clara and her baby Clarita; vets round up the older orangutans, who are now ready to be released.

Lizzie gets to know Fera, the Queen of the Pantanal, as she teaches her rambunctious cub Simba some essential jaguar skills, including how to climb trees and hunt for dinner.

The wildlife hospital is swamped after a major flood crisis in Brisbane.

An operation for a critical koala and rainbow lorikeets create chaos.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

The team prepares for the annual open house; Aislyn spends her last day organizing the second raccoon roundup.

Hope prepares for the annual open house, but approaching rainstorms threaten the event.

A rare owl appears ready for release but everyone wonders if it will fly.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

The team prepares for the annual open house; Aislyn spends her last day organizing the second raccoon roundup.

Hope prepares for the annual open house, but approaching rainstorms threaten the event.

"Class Clown" Valentino is busy showing off; the staff decide that "Big Boy" Beni needs to lose weight; teenage mom Clara and her baby Clarita face a return to island life; they welcome a new pupil: Alba, the only reported albino orangutan.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

Meandering through the black waters of a primordial river immortalized in a folk song.

Lizzie gets to know Fera, the Queen of the Pantanal, as she teaches her rambunctious cub Simba some essential jaguar skills, including how to climb trees and hunt for dinner.

The wildlife hospital is swamped after a major flood crisis in Brisbane.

An operation for a critical koala and rainbow lorikeets create chaos.

In South Dakota, the rugged beauty of the Badlands is the backdrop for an assortment of animals, including the American bison, the black-tailed prairie dog and the burrowing owl; prairie dog pups are threatened by badgers, golden eagles and coyotes.

A look at the wide variety of creatures - both native and invasive - that currently occupy the city of Miami, including peacocks, pythons and parrots.

Tracking chimpanzees through the Rwandan forest with Max, who tries to convince these powerful monkeys that he's a friend, not a foe; key tips on jungle dining and witnessing complex family dynamics, including grooming and socializing.

In South Dakota, the rugged beauty of the Badlands is the backdrop for an assortment of animals, including the American bison, the black-tailed prairie dog and the burrowing owl; prairie dog pups are threatened by badgers, golden eagles and coyotes.

A look at the wide variety of creatures - both native and invasive - that currently occupy the city of Miami, including peacocks, pythons and parrots.

Tracking chimpanzees through the Rwandan forest with Max, who tries to convince these powerful monkeys that he's a friend, not a foe; key tips on jungle dining and witnessing complex family dynamics, including grooming and socializing.

"Class Clown" Valentino is busy showing off; the staff decide that "Big Boy" Beni needs to lose weight; teenage mom Clara and her baby Clarita face a return to island life; they welcome a new pupil: Alba, the only reported albino orangutan.

In South Dakota, the rugged beauty of the Badlands is the backdrop for an assortment of animals, including the American bison, the black-tailed prairie dog and the burrowing owl; prairie dog pups are threatened by badgers, golden eagles and coyotes.

A look at the wide variety of creatures - both native and invasive - that currently occupy the city of Miami, including peacocks, pythons and parrots.

Tracking chimpanzees through the Rwandan forest with Max, who tries to convince these powerful monkeys that he's a friend, not a foe; key tips on jungle dining and witnessing complex family dynamics, including grooming and socializing.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

The crew deals with emergencies in the bone-chilling cold; a herd of white-tailed deer is released.

Animals - and a plant - that use stench to survive.

Two tiny orphans struggle to survive; Hope takes a second swing at a release gone wrong.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

The crew deals with emergencies in the bone-chilling cold; a herd of white-tailed deer is released.

Animals - and a plant - that use stench to survive.

Kasper, who is 90kgs, somehow eludes the capture team and climbs 30 meters high in a tree; Beni's food theft and ongoing weight gain starts causing serious concern for his health.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

The kangaroos that populate the woodlands, pastures and forests of Australia cluster together in groups known as mobs.

Aggressive predators, extreme weather and lively joeys can make it challenging for mother kangaroos.

Male kangaroos, also known as bucks, face both risk and reward in their drive to secure their species.

A two-year-old Tasmanian Devil named Carlos looks for food and fights for dominance.

In South Dakota, the rugged beauty of the Badlands is the backdrop for an assortment of animals, including the American bison, the black-tailed prairie dog and the burrowing owl; prairie dog pups are threatened by badgers, golden eagles and coyotes.

A look at the wide variety of creatures - both native and invasive - that currently occupy the city of Miami, including peacocks, pythons and parrots.

Tracking chimpanzees through the Rwandan forest with Max, who tries to convince these powerful monkeys that he's a friend, not a foe; key tips on jungle dining and witnessing complex family dynamics, including grooming and socializing.

Prepare for the summer cubs' release with Roger; meet Ace and Little Blueberry, two newbies with serious health issues who will have to stay over the winter with the Z cubs; six happy, healthy bears embark on their new lives in the wild.

A first-person look at the lives of ocean creatures including sharks, elephant seals, turtles and gannets.

In a South African sanctuary, Liz meets a nine-year-old lion called Ricci whose teeth are in such rough shape he can't eat; specially trained vets use unique tools and slightly more anaesthetic than estimated on the wakeful patient.

Prepare for the summer cubs' release with Roger; meet Ace and Little Blueberry, two newbies with serious health issues who will have to stay over the winter with the Z cubs; six happy, healthy bears embark on their new lives in the wild.

A first-person look at the lives of ocean creatures including sharks, elephant seals, turtles and gannets.

In a South African sanctuary, Liz meets a nine-year-old lion called Ricci whose teeth are in such rough shape he can't eat; specially trained vets use unique tools and slightly more anaesthetic than estimated on the wakeful patient.

Kasper, who is 90kgs, somehow eludes the capture team and climbs 30 meters high in a tree; Beni's food theft and ongoing weight gain starts causing serious concern for his health.

Prepare for the summer cubs' release with Roger; meet Ace and Little Blueberry, two newbies with serious health issues who will have to stay over the winter with the Z cubs; six happy, healthy bears embark on their new lives in the wild.

A first-person look at the lives of ocean creatures including sharks, elephant seals, turtles and gannets.

In a South African sanctuary, Liz meets a nine-year-old lion called Ricci whose teeth are in such rough shape he can't eat; specially trained vets use unique tools and slightly more anaesthetic than estimated on the wakeful patient.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

Bizarre birds have various adaptations.

Some survival adaptations make creatures ugly.

A most unusual fawn arrives on Hope's doorstep; a graveyard is the spooky setting for an unlikely reunion.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

Bizarre birds have various adaptations.

Some survival adaptations make creatures ugly.

Valentino, Yutris and the rest of group two have fun as they visit group three's flooded classroom; three quarantine infants get the results of their TB tests; the residents of Bangamat Island do not welcome newcomers leading to a confrontation.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

The wildlife rescue team attempt to collar an elephant, save a vervet monkey's leg, and help a baboon fend for herself.

Amanda and Mandy try everything at their disposal to help a snared hyena; the team's plan to release a troop of 13 monkeys is halted by last-minute surgery and some crafty escapees.

Cabo Pulmo is the site of an extraordinary marine recovery.

The island nation of Palau created the first shark sanctuary and the largest marine sanctuary.

Prepare for the summer cubs' release with Roger; meet Ace and Little Blueberry, two newbies with serious health issues who will have to stay over the winter with the Z cubs; six happy, healthy bears embark on their new lives in the wild.

A first-person look at the lives of ocean creatures including sharks, elephant seals, turtles and gannets.

In a South African sanctuary, Liz meets a nine-year-old lion called Ricci whose teeth are in such rough shape he can't eat; specially trained vets use unique tools and slightly more anaesthetic than estimated on the wakeful patient.

Researchers risk everything to unlock secret shark behaviors, challenge myths about sharks, and fight for the protection of these predators.

Navigating the harsh Mongolian wilderness with Dan as he searches for The Dude, the largest snow leopard ever recorded; he battles hostile landscapes and uncertainty as he sheds light on the challenges that The Dude and other snow leopards face.

Navigating the harsh Mongolian wilderness with Dan O'Neill as he searches for the Dude, the largest snow leopard ever recorded.

Researchers risk everything to unlock secret shark behaviors, challenge myths about sharks, and fight for the protection of these predators.

Navigating the harsh Mongolian wilderness with Dan as he searches for The Dude, the largest snow leopard ever recorded; he battles hostile landscapes and uncertainty as he sheds light on the challenges that The Dude and other snow leopards face.

Navigating the harsh Mongolian wilderness with Dan O'Neill as he searches for the Dude, the largest snow leopard ever recorded.

Valentino, Yutris and the rest of group two have fun as they visit group three's flooded classroom; three quarantine infants get the results of their TB tests; the residents of Bangamat Island do not welcome newcomers leading to a confrontation.

Researchers risk everything to unlock secret shark behaviors, challenge myths about sharks, and fight for the protection of these predators.

Navigating the harsh Mongolian wilderness with Dan as he searches for The Dude, the largest snow leopard ever recorded; he battles hostile landscapes and uncertainty as he sheds light on the challenges that The Dude and other snow leopards face.

Navigating the harsh Mongolian wilderness with Dan O'Neill as he searches for the Dude, the largest snow leopard ever recorded.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

Animals that employ trickery: stick bugs, lion fish, emperor scorpions, and chameleons.

Recent research into bird-like qualities of dinosaurs.

Two members of Hope's team travel to England to discover new techniques and make allies on the front lines of animal rescue.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

Animals that employ trickery: stick bugs, lion fish, emperor scorpions, and chameleons.

Recent research into bird-like qualities of dinosaurs.

Moving day arrives for the nursery school kids; Beni gets a beating from a bully; the socialization cage has a new queen; dominant male Pujon is still on a time-out after attacking Alba, but he's allowed a second chance to bond with his rival.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

Stories of how animals react to Earth's extremes, from humpback whales to tiny butterflies and savanna chimpanzees.

From the Galapagos Islands to the edge of Antarctica, island wildlife reveal insights into the rapidly changing planet.

Animals go to extraordinary lengths to survive in the hottest and driest extremes, from the Sahara Desert to Australia.

Polar bears in the Arctic, penguins in Antarctica and other animals on icy islands can reveal changes taking place at the planet's frozen extremes.

Researchers risk everything to unlock secret shark behaviors, challenge myths about sharks, and fight for the protection of these predators.

Navigating the harsh Mongolian wilderness with Dan as he searches for The Dude, the largest snow leopard ever recorded; he battles hostile landscapes and uncertainty as he sheds light on the challenges that The Dude and other snow leopards face.

Navigating the harsh Mongolian wilderness with Dan O'Neill as he searches for the Dude, the largest snow leopard ever recorded.

The animal families in Serengeti stick together, share food, and play around in the grasslands. The young ones get acquainted with the ways of the wild.

Uncover the profound significance and uncertain future of our rivers.

Twice the size of the British Isles, Borneo is the third largest island on Earth and home to possibly the greatest diversity of life of any island, from flying lizards sun bears to orangutans.

The animal families in Serengeti stick together, share food, and play around in the grasslands. The young ones get acquainted with the ways of the wild.

Uncover the profound significance and uncertain future of our rivers.

Twice the size of the British Isles, Borneo is the third largest island on Earth and home to possibly the greatest diversity of life of any island, from flying lizards sun bears to orangutans.

Moving day arrives for the nursery school kids; Beni gets a beating from a bully; the socialization cage has a new queen; dominant male Pujon is still on a time-out after attacking Alba, but he's allowed a second chance to bond with his rival.

The animal families in Serengeti stick together, share food, and play around in the grasslands. The young ones get acquainted with the ways of the wild.

Uncover the profound significance and uncertain future of our rivers.

Twice the size of the British Isles, Borneo is the third largest island on Earth and home to possibly the greatest diversity of life of any island, from flying lizards sun bears to orangutans.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

Animals that have evolved unusual abilities.

The red fox of Prince Edward Island.

Barry and Hayley's adventure in the UK continues at a rehab center where they use the latest in alternative therapies.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

Animals that have evolved unusual abilities.

The red fox of Prince Edward Island.

Beni faces a day of reckoning as all the forest school students are held back for a weigh-in; Alba is back in isolation after being diagnosed with typhoid.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

Scientists take a look at animal species with the power to transform and restore grasslands.

A look at the extraordinary wildlife, landscapes and people of the Amazon, the world's greatest river; from boiling streams and transparent lagoons, to pink river dolphins and riotous river carnivals, its great size hides spectacular secrets.

A look at the astonishing wildlife, landscapes and people of the Nile, the world's longest river; from elephants and leopards, to extreme kayakers and ancient wonders, its great length is a lifeline for astonishing wildlife and cultures.

The Mississippi, from frozen waterfalls to time-traveling barges, from busy beavers to mysterious swamps, connects a continent like no other river. At the end of its 3,500-mile journey, it creates one of the biggest river deltas on the planet.

The animal families in Serengeti stick together, share food, and play around in the grasslands. The young ones get acquainted with the ways of the wild.

Uncover the profound significance and uncertain future of our rivers.

Twice the size of the British Isles, Borneo is the third largest island on Earth and home to possibly the greatest diversity of life of any island, from flying lizards sun bears to orangutans.

Get chills as winter descends, slowing down life on the bustling reef; meander with reef sharks and octopuses, visit a coral oasis atop an old shipwreck, and spot a banded snake eel's talent for identity theft when it disguises itself as a predator.

Exploring the softer side of Tasmanian devils; meeting a pioneering sea turtle and enjoying family dinner with Buttons, the deer; playing football with a bull.

Flapping around with Banksi the fruit bat and his human surrogate mom; eyeing a mischievous emu; celebrating a pig's rescue-versary; touring manatee heaven; learning to speak baboon with Dingani.

Get chills as winter descends, slowing down life on the bustling reef; meander with reef sharks and octopuses, visit a coral oasis atop an old shipwreck, and spot a banded snake eel's talent for identity theft when it disguises itself as a predator.

Exploring the softer side of Tasmanian devils; meeting a pioneering sea turtle and enjoying family dinner with Buttons, the deer; playing football with a bull.

Flapping around with Banksi the fruit bat and his human surrogate mom; eyeing a mischievous emu; celebrating a pig's rescue-versary; touring manatee heaven; learning to speak baboon with Dingani.

Beni faces a day of reckoning as all the forest school students are held back for a weigh-in; Alba is back in isolation after being diagnosed with typhoid.

Get chills as winter descends, slowing down life on the bustling reef; meander with reef sharks and octopuses, visit a coral oasis atop an old shipwreck, and spot a banded snake eel's talent for identity theft when it disguises itself as a predator.

Exploring the softer side of Tasmanian devils; meeting a pioneering sea turtle and enjoying family dinner with Buttons, the deer; playing football with a bull.

Flapping around with Banksi the fruit bat and his human surrogate mom; eyeing a mischievous emu; celebrating a pig's rescue-versary; touring manatee heaven; learning to speak baboon with Dingani.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

An in-depth look at the American shad on its epic journey upstream, back to its fresh water birthplace to spawn.

The bald eagle reigns supreme as the ultimate predator above the waters of Bras d'Or Lake on Canada's eastern shore.

A bobcat kitten needs Hope's help but this little orphan causes big headaches.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

An in-depth look at the American shad on its epic journey upstream, back to its fresh water birthplace to spawn.

The bald eagle reigns supreme as the ultimate predator above the waters of Bras d'Or Lake on Canada's eastern shore.

Rescued orphan Josh needs his broken wrist examined by the school vets, while Beni has a trip to the dentist to treat his bad breath.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

A southern African mangrove forest experiences the changes between high and low tide.

The Okavango Delta is home to a wide variety of African wildlife.

Penguins live on a tiny, urban cape in South Africa.

During the dry season, the quest for water governs the lives of the animals in South Africa.

Get chills as winter descends, slowing down life on the bustling reef; meander with reef sharks and octopuses, visit a coral oasis atop an old shipwreck, and spot a banded snake eel's talent for identity theft when it disguises itself as a predator.

Exploring the softer side of Tasmanian devils; meeting a pioneering sea turtle and enjoying family dinner with Buttons, the deer; playing football with a bull.

Flapping around with Banksi the fruit bat and his human surrogate mom; eyeing a mischievous emu; celebrating a pig's rescue-versary; touring manatee heaven; learning to speak baboon with Dingani.

Getting to know all 18 members of the penguin family, including the quirky ones.

A look at the extraordinary wildlife, landscapes and people of the Amazon, the world's greatest river; from boiling streams and transparent lagoons, to pink river dolphins and riotous river carnivals, its great size hides spectacular secrets.

Summer arrives and Gordon finds out that Tiny the bear cub has been abandoned by her mother.

Getting to know all 18 members of the penguin family, including the quirky ones.

A look at the extraordinary wildlife, landscapes and people of the Amazon, the world's greatest river; from boiling streams and transparent lagoons, to pink river dolphins and riotous river carnivals, its great size hides spectacular secrets.

Summer arrives and Gordon finds out that Tiny the bear cub has been abandoned by her mother.

Rescued orphan Josh needs his broken wrist examined by the school vets, while Beni has a trip to the dentist to treat his bad breath.

Getting to know all 18 members of the penguin family, including the quirky ones.

A look at the extraordinary wildlife, landscapes and people of the Amazon, the world's greatest river; from boiling streams and transparent lagoons, to pink river dolphins and riotous river carnivals, its great size hides spectacular secrets.

Summer arrives and Gordon finds out that Tiny the bear cub has been abandoned by her mother.

Rumoured to be the cleanest river in Europe, few dispute it's the coldest; cascading down from the Dinaric Alps in Serbia, it soon crosses the border into Bosnia Herzegovina, where marine biologist and fisherman Sanel Riđanović casts for salmon.

A plethora of creatures seek refuge from the rise and fall of the tide in Duncan's Cove and the Bay of Fundy.

A look at two very different insect species showcasing their expert pollination skills at Nova Scotia's Annapolis Valley; honey bees and monarch butterflies.

Hope Swinimer rescues, rehabilitates and releases thousands of animals while struggling to make ends meet.

Rumoured to be the cleanest river in Europe, few dispute it's the coldest; cascading down from the Dinaric Alps in Serbia, it soon crosses the border into Bosnia Herzegovina, where marine biologist and fisherman Sanel Riđanović casts for salmon.

A plethora of creatures seek refuge from the rise and fall of the tide in Duncan's Cove and the Bay of Fundy.

A look at two very different insect species showcasing their expert pollination skills at Nova Scotia's Annapolis Valley; honey bees and monarch butterflies.

The babysitters try to get Beni's diet under control; Malika shows off her passion for fashion; Darryl and Syahrini get steamy in the treetops; Cinta makes a watery discovery; two new babies arrive, one of whom is emaciated.

Rumoured to be the cleanest river in Europe, few dispute it's the coldest; cascading down from the Dinaric Alps in Serbia, it soon crosses the border into Bosnia Herzegovina, where marine biologist and fisherman Sanel Riđanović casts for salmon.

From a tick-infested rhino to the freshwater turtles who nip the insects off the giant beast, all life is connected; following the complex web of relationships between these species and more to see how each creature fits into one magical whole.

The Nile crocodile and hippopotamus are two of Africa's amphibious freshwater icons.

Explore the harsh realities that shape hippo life on Zambia's Luangwa River; meet a bull who serves as river master, a mother determined to protect her newborn calf and ancient rivals who fight to the death as the dry season reaches its apex.

A feeding frenzy for hungry predators at the Serengeti National Park as the Great Migration arrives triggered by seasonal rains.

Getting to know all 18 members of the penguin family, including the quirky ones.

A look at the extraordinary wildlife, landscapes and people of the Amazon, the world's greatest river; from boiling streams and transparent lagoons, to pink river dolphins and riotous river carnivals, its great size hides spectacular secrets.

Summer arrives and Gordon finds out that Tiny the bear cub has been abandoned by her mother.

Rejoining the team for some post-rainy-season drama as they search for Ferinha, Fera and Badalo, whose tracking collars are missing; meeting a new biologist, who helps Lizzie recollar the jaguars.

Explore community-run Reteti Elephant Sanctuary, where human surrogate moms offer survival lessons and nurture young elephants through play; bonding with trunkless Long'uro and seeing why Kelele's mysterious illness could delay his release.

Rejoining the team for some post-rainy-season drama as they search for Ferinha, Fera and Badalo, whose tracking collars are missing; meeting a new biologist, who helps Lizzie recollar the jaguars.

Explore community-run Reteti Elephant Sanctuary, where human surrogate moms offer survival lessons and nurture young elephants through play; bonding with trunkless Long'uro and seeing why Kelele's mysterious illness could delay his release.

The babysitters try to get Beni's diet under control; Malika shows off her passion for fashion; Darryl and Syahrini get steamy in the treetops; Cinta makes a watery discovery; two new babies arrive, one of whom is emaciated.

Rejoining the team for some post-rainy-season drama as they search for Ferinha, Fera and Badalo, whose tracking collars are missing; meeting a new biologist, who helps Lizzie recollar the jaguars.

Explore community-run Reteti Elephant Sanctuary, where human surrogate moms offer survival lessons and nurture young elephants through play; bonding with trunkless Long'uro and seeing why Kelele's mysterious illness could delay his release.

Tackling the grade 6 rapids and untamed waters of the Buller River on the west coast of New Zealand's South Island, blessed by a Māori elder of the Ngāti Apa ki te Rā Tō.

Animals that survive in cities.

Cape Breton Highlands National Park faces destruction by various species.

Preparations for Hope's open house are derailed when a patient goes missing; the event may be too successful for its own good.

Tackling the grade 6 rapids and untamed waters of the Buller River on the west coast of New Zealand's South Island, blessed by a Māori elder of the Ngāti Apa ki te Rā Tō.

Animals that survive in cities.

Cape Breton Highlands National Park faces destruction by various species.

Difficult quarantine student Taymur has a breakthrough and starts to embrace his jungle school lesson; serial truant Luthy skips class again and gives the staff a run for their money.

Tackling the grade 6 rapids and untamed waters of the Buller River on the west coast of New Zealand's South Island, blessed by a Māori elder of the Ngāti Apa ki te Rā Tō.

Introducing a cast of charismatic animals to reveal the remarkable strategies they use to survive, and even thrive, in winter - for animals this is the toughest time of year, and preparations start early.

Entertainer Cher and a team of vets, trainers, and more lead a large-scale effort to move a bull elephant from a rundown zoo to a faraway wildlife sanctuary.

Giles cares for a sun bear cub while building a rescue center in Laos.

Giles helps two moon bear cubs and is shocked with news at the sanctuary.

Rejoining the team for some post-rainy-season drama as they search for Ferinha, Fera and Badalo, whose tracking collars are missing; meeting a new biologist, who helps Lizzie recollar the jaguars.

Explore community-run Reteti Elephant Sanctuary, where human surrogate moms offer survival lessons and nurture young elephants through play; bonding with trunkless Long'uro and seeing why Kelele's mysterious illness could delay his release.

An international team of scientists investigates overfishing and how close we are to a global crash in fish populations.

The oceans have hidden the true depth of their hunters' inventiveness; but, wildlife photographers below and above the water's surface are capturing images that show off their prowess; discover their secrets as we travel the world.

Looking inside the secret world of the fearless, often misunderstood sloth bear; travelling to Sri Lanka and discovering how this fierce, shaggy animal fights off leopards and other deadly rivals, all while trying to secure enough protein to survive.

An international team of scientists investigates overfishing and how close we are to a global crash in fish populations.

The oceans have hidden the true depth of their hunters' inventiveness; but, wildlife photographers below and above the water's surface are capturing images that show off their prowess; discover their secrets as we travel the world.

Looking inside the secret world of the fearless, often misunderstood sloth bear; travelling to Sri Lanka and discovering how this fierce, shaggy animal fights off leopards and other deadly rivals, all while trying to secure enough protein to survive.

Difficult quarantine student Taymur has a breakthrough and starts to embrace his jungle school lesson; serial truant Luthy skips class again and gives the staff a run for their money.

An international team of scientists investigates overfishing and how close we are to a global crash in fish populations.

The oceans have hidden the true depth of their hunters' inventiveness; but, wildlife photographers below and above the water's surface are capturing images that show off their prowess; discover their secrets as we travel the world.

Looking inside the secret world of the fearless, often misunderstood sloth bear; travelling to Sri Lanka and discovering how this fierce, shaggy animal fights off leopards and other deadly rivals, all while trying to secure enough protein to survive.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

Marshes and bogs are home to the endangered Blanding's Turtle, but the habitat is disappearing.

The complicated relationships of crustaceans.

A moose on the loose raises a ruckus; a permanent resident becomes a lovable nuisance.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

Marshes and bogs are home to the endangered Blanding's Turtle, but the habitat is disappearing.

The complicated relationships of crustaceans.

Six graduates from jungle school are finally set to be freed into the wild from the pre-release islands after an arduous journey by road and river into the heart of Borneo.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

Koalas live in isolated forests in east and southeast Australia.

Koala behavior changes dramatically during mating season.

Seven daredevil filmmakers try to capture a shark shot; see the preparation and planning that goes into achieving the desired footage.

In September, one side of Sri Lanka is drenched in monsoons, while the other withers in drought, creating two different habitats and diversity of life.

An international team of scientists investigates overfishing and how close we are to a global crash in fish populations.

The oceans have hidden the true depth of their hunters' inventiveness; but, wildlife photographers below and above the water's surface are capturing images that show off their prowess; discover their secrets as we travel the world.

Looking inside the secret world of the fearless, often misunderstood sloth bear; travelling to Sri Lanka and discovering how this fierce, shaggy animal fights off leopards and other deadly rivals, all while trying to secure enough protein to survive.