Facts and trivia about Bernese mountain dogs, Afghan hounds, Portuguese water dogs, Cairn terriers and Alaskan malamutes.

Tragedy strikes when Pete and Ally's farm is burglarized right before harvest; Tom's main worker Joe needs a major attitude check before taking vital exams; Ian is determined to grow his herd, but is faced with a difficult decision.

Problems arise when Ally's grass baler malfunctions and Dad Graham steps in to help; Ian and Stef are put to the test at their Shropshire farm bakery; Tom discovers a stock of sickly sheep that could threaten his profits at auction.

Hunter the koala is ready for a mate; Jaws the Galápagos tortoise isn't feeling well and the zoo staff works to bring him out of his shell; the Safari Park has two baby giraffe calves that need to be hand-reared simultaneously.

Safari Park keepers prepare Aria the rambunctious black rhino for her new life on the open African Plains exhibit; zoo staff cares for 15-year-old legend M'bari the lion and his mate, Etosha; a vulture chick learns to eat from a surrogate puppet.

While pregnant, Bindi continues to work at the Wildlife Hospital.

Tania is shocked by what she finds once she gets a stray dog back to the rescue; an empty nester brings her family to Villalobos to help her find a companion; the family is determined to solve a messy pigeon problem.

One of Earl's favorite senior dogs finally has a chance at his forever home; Tia heads to a small shelter in rural Louisiana to help with a hound; Tania, Mariah and Lizzy take on a project that showcases dogs in their forever homes.

Forest sets off on a dangerous, shark-infested search for the extinct Caribbean monk seal, to prove its existence, he and the crew descend into deep waters where they come face-to-face with a giant tiger shark.

The southern Rocky Mountain wolf hasn't been seen in almost 80 years, but recent cattle attacks spark the possibility that is still exists; trekking high into the Sierras, Forrest is determined to bring it out of hiding.

In Vietnam, Forrest teams up with a conservation group to save the largest turtle species in the world from extinction; using cutting edge technology, they attempt to find a suitor for the last and only surviving Giant Softshell.

Deep in the jungles of Colombia, Forrest is on a mission to prove the Rio Apaporis Caiman still exists. Locals believe this crocodilian resides within a lawless land inhabited by guerilla rebels, kidnappers, and deadly predators.

Forrest ventures home to Zimbabwe in search of the mysterious Cape lion; he and the crew navigate the African bush determined to get DNA proof, facing threats of charging rhinos and huge prides of lions.

After a python eats a gator, many theories about the battle are developed. African Rock pythons are becoming a problem in the suburbs of Miami.

Burmese pythons and venomous cottonmouths are turning up in unexpected places.

Deadly snake in a mailbox; 12-foot python.

The Venom One team encounters a python with a possible family pet in its stomach.

After a python eats a gator, many theories about the battle are developed. African Rock pythons are becoming a problem in the suburbs of Miami.

Burmese pythons and venomous cottonmouths are turning up in unexpected places.

Deadly snake in a mailbox; 12-foot python.

The Venom One team encounters a python with a possible family pet in its stomach.

The southern Rocky Mountain wolf hasn't been seen in almost 80 years, but recent cattle attacks spark the possibility that is still exists; trekking high into the Sierras, Forrest is determined to bring it out of hiding.

In Vietnam, Forrest teams up with a conservation group to save the largest turtle species in the world from extinction; using cutting edge technology, they attempt to find a suitor for the last and only surviving Giant Softshell.

Facts and trivia about border collies, Chinese cresteds, English mastiffs, Italian greyhounds and Lhasa Apsos.

After a python eats a gator, many theories about the battle are developed. African Rock pythons are becoming a problem in the suburbs of Miami.

Labradoodle, puggle, chiweenie, goldendoodle, cavachon, and the chorkie.

Burmese pythons and venomous cottonmouths are turning up in unexpected places.

In Shropshire, Ian is forced to make an expensive decision about his problematic prized bull; Ally resurrects rusting machinery, and a potential barn fire keeps Tom and Joe on their toes as they stack the year's hay harvest.

Deadly snake in a mailbox; 12-foot python.

Ian's fleet on ageing tractors buckle under the strain of the first harvest of the year; Ally faces spiraling costs as his new campsite venture slips months behind schedule.

The Venom One team encounters a python with a possible family pet in its stomach.

The Zoo says goodbye to beloved pandas Bai-Yun and Xiao Liwu as mother and cub prepare to return to China; Tembo the retired Hollywood elephant tries traditional Chinese medicine for her arthritis; The Butterfly Jungle gets colored for the season.

The southern Rocky Mountain wolf hasn't been seen in almost 80 years, but recent cattle attacks spark the possibility that is still exists; trekking high into the Sierras, Forrest is determined to bring it out of hiding.

After six years away, Mek the tiger returns to the Zoo; two shy tree kangaroos, Spike and Polly, meet for the first time; with the Children's Zoo under construction, the keepers have to move over 100 animals, including a herd of reluctant goats.

In Vietnam, Forrest teams up with a conservation group to save the largest turtle species in the world from extinction; using cutting edge technology, they attempt to find a suitor for the last and only surviving Giant Softshell.

The Irwins take action when a croc becomes ill.

Facts and trivia about border collies, Chinese cresteds, English mastiffs, Italian greyhounds and Lhasa Apsos.

Wanting to give the senior dogs a special place, Lizzy, Tania, and Mariah create a retirement center at one of the warehouses. And, Lizzy rescues a dog that has one of the worst skin conditions she has ever seen.

Labradoodle, puggle, chiweenie, goldendoodle, cavachon, and the chorkie.

Lizzy tries to track down the owner of a dog tied up outside the rescue; an older couple comes looking for their first dog, but their choice requires some special temperament testing; when a dog develops allergies, Mariah looks for a natural cure.

In Shropshire, Ian is forced to make an expensive decision about his problematic prized bull; Ally resurrects rusting machinery, and a potential barn fire keeps Tom and Joe on their toes as they stack the year's hay harvest.

Pete takes on his first international tree house in Norway; working alongside a local builder named Frode, the one-of-a-kind, 24-foot-high retreat accommodates eight and allows for stunning views of the nearby lake.

Ian's fleet on ageing tractors buckle under the strain of the first harvest of the year; Ally faces spiraling costs as his new campsite venture slips months behind schedule.

When asked in 2016 what she would do with her winnings, "America's Got Talent" Season 11 winner Grace Vanderwaal said she wanted a tree house built by Pete Nelson; the 13-year-old singer-songwriter's wish comes true.

The Zoo says goodbye to beloved pandas Bai-Yun and Xiao Liwu as mother and cub prepare to return to China; Tembo the retired Hollywood elephant tries traditional Chinese medicine for her arthritis; The Butterfly Jungle gets colored for the season.

Pete journeys to the pine-forested splendor of Scandinavia to explore Norway's magical TreeTop Hotel and Sweden's floating Treehotel, with tree homes suspended by cables and accessed only by retractable ladders.

After six years away, Mek the tiger returns to the Zoo; two shy tree kangaroos, Spike and Polly, meet for the first time; with the Children's Zoo under construction, the keepers have to move over 100 animals, including a herd of reluctant goats.

Pete's fun-loving friend is the lucky recipient of a treehouse built strictly for good times; the team builds a dream of a treehouse complete with a wine bar, a loft, and their first-ever hot tub in the woods of Western Washington.

The Irwins take action when a croc becomes ill.

Taking a look back at builds from the past is always a joy for Pete Nelson and the carpenters of NT&S; Pete and a few crew members gather around the campfire to poke fun at one another about the shenanigans they shared when building in the trees.

Wanting to give the senior dogs a special place, Lizzy, Tania, and Mariah create a retirement center at one of the warehouses. And, Lizzy rescues a dog that has one of the worst skin conditions she has ever seen.

Pete and the team travel to Trempealeau, Wis., to build a rustic river shack-themed tree house for two parents who yearn for an easy escape after a long day.

Lizzy tries to track down the owner of a dog tied up outside the rescue; an older couple comes looking for their first dog, but their choice requires some special temperament testing; when a dog develops allergies, Mariah looks for a natural cure.

Pete creates an off-the-grid escape that's all about peace, love, and treehouses, man; building a stunning treehouse made from re-purposed materials, while the client, Sarah Jay, adds her own touch - a massive dream net hammock in the trees.

Pete builds a citadel fortress for a Texan couple who loves all things medieval; a 25-foot-high tower holds a round table and thrones, as well as a glass floor loft; a metalsmith joins the build to craft medieval touches.

Pete builds an all-star speakeasy for basketball legend Shaquille O'Neal; the ball is in Pete's court to design a decagonal structure with a soaring 25 ft. high ceiling and extra wide stairs to accommodate Shaq and his size 22 shoes.

Pete and the team travel to Trempealeau, Wis., to build a rustic river shack-themed tree house for two parents who yearn for an easy escape after a long day.

Pete creates an off-the-grid escape that's all about peace, love, and treehouses, man; building a stunning treehouse made from re-purposed materials, while the client, Sarah Jay, adds her own touch - a massive dream net hammock in the trees.

Pete builds a citadel fortress for a Texan couple who loves all things medieval; a 25-foot-high tower holds a round table and thrones, as well as a glass floor loft; a metalsmith joins the build to craft medieval touches.

Pete builds an all-star speakeasy for basketball legend Shaquille O'Neal; the ball is in Pete's court to design a decagonal structure with a soaring 25 ft. high ceiling and extra wide stairs to accommodate Shaq and his size 22 shoes.

When asked in 2016 what she would do with her winnings, "America's Got Talent" Season 11 winner Grace Vanderwaal said she wanted a tree house built by Pete Nelson; the 13-year-old singer-songwriter's wish comes true.

Pete journeys to the pine-forested splendor of Scandinavia to explore Norway's magical TreeTop Hotel and Sweden's floating Treehotel, with tree homes suspended by cables and accessed only by retractable ladders.

Trouble arises when a storm hits, halting Queen Olivia's triumphant return to Bay City; Eva grieves the death of her mate; Princess Sasha's affair with a Mudpaw threatens the royal bloodline.

Pete and the team travel to Trempealeau, Wis., to build a rustic river shack-themed tree house for two parents who yearn for an easy escape after a long day.

Queen Olivia plans a surprise attack on two warring clans; Princess Eva and Empress White Whiskers fight for their clans' survival.

Pete creates an off-the-grid escape that's all about peace, love, and treehouses, man; building a stunning treehouse made from re-purposed materials, while the client, Sarah Jay, adds her own touch - a massive dream net hammock in the trees.

Jeremy Wade ventures to Africa's Rift Valley to explore the roots of fishing and the monsters the first fishermen faced; a dangerous place, the valley hosts killer crocs, hippos and warring gangs, but also a worthy prize: the Mputa, aka Nile Perch.

Pete builds a citadel fortress for a Texan couple who loves all things medieval; a 25-foot-high tower holds a round table and thrones, as well as a glass floor loft; a metalsmith joins the build to craft medieval touches.

Jeremy explores the legends and mystery surrounding the Congo River in central Africa.

Pete builds an all-star speakeasy for basketball legend Shaquille O'Neal; the ball is in Pete's court to design a decagonal structure with a soaring 25 ft. high ceiling and extra wide stairs to accommodate Shaq and his size 22 shoes.

Jeremy travels to South Africa to catch a bull shark lurking in freshwater locales.

When asked in 2016 what she would do with her winnings, "America's Got Talent" Season 11 winner Grace Vanderwaal said she wanted a tree house built by Pete Nelson; the 13-year-old singer-songwriter's wish comes true.

Jeremy Wade travels to the Sepik River in New Guinea to investigate a creature suspected of taking the lives of at least two fishermen.

Pete journeys to the pine-forested splendor of Scandinavia to explore Norway's magical TreeTop Hotel and Sweden's floating Treehotel, with tree homes suspended by cables and accessed only by retractable ladders.

Angler Jeremy Wade heads to the Australian outback to try and catch the rare and fearsome freshwater sawfish, a shadowy predator said to be 18 feet long and known to attack boats.

Trouble arises when a storm hits, halting Queen Olivia's triumphant return to Bay City; Eva grieves the death of her mate; Princess Sasha's affair with a Mudpaw threatens the royal bloodline.

Forrest travels to Missouri with zoologist and wife Jessica to meet a man who claims he witnessed a wolf-like creature with a strange howl and distinct odor; a chance encounter with a local moonshiner leads them to an amazing discovery.

Queen Olivia plans a surprise attack on two warring clans; Princess Eva and Empress White Whiskers fight for their clans' survival.

Forrest and team dive into the Anaconda's lair to find the infamous snake.

Jeremy Wade ventures to Africa's Rift Valley to explore the roots of fishing and the monsters the first fishermen faced; a dangerous place, the valley hosts killer crocs, hippos and warring gangs, but also a worthy prize: the Mputa, aka Nile Perch.

Dr. Jeff performs a new surgery to save the life of a family's cherished dog; Dr. Baier treats a class act with a big personality; the Planned Pethood team gives puppy mill pups a second shot at life.

Jeremy explores the legends and mystery surrounding the Congo River in central Africa.

A puppy needs a high-risk surgery; a 3-day-old kitten needs immediate help; a deadly virus halves a puppy's chances at life.

Jeremy travels to South Africa to catch a bull shark lurking in freshwater locales.

When a young Boxer falls from a second-story window, the team races to the rescue; Dr. Jeff discovers a life-threatening problem in a Great Dane; after a beloved cat is attacked by a mystery animal at night, Dr. Don battles to save his leg.

Jeremy Wade travels to the Sepik River in New Guinea to investigate a creature suspected of taking the lives of at least two fishermen.

The team travels to Romania to assist with a street dog problem; a deaf dog needs a complex surgery; a wounded European bison takes the team to the mountains.

Angler Jeremy Wade heads to the Australian outback to try and catch the rare and fearsome freshwater sawfish, a shadowy predator said to be 18 feet long and known to attack boats.

Dr. Jeff and his team head to Houston to rescue dogs in the aftermath of devastating floods; in Denver, Dr. Amy treats a cat with a mysterious wound; a young Lab needs emergency surgery after eating something unusual.

Forrest travels to Missouri with zoologist and wife Jessica to meet a man who claims he witnessed a wolf-like creature with a strange howl and distinct odor; a chance encounter with a local moonshiner leads them to an amazing discovery.

Julia and her husband John must catch the second most venomous land snake in the world in a cramped laundry room. A snake has invaded a dog breeder's garden full of puppies. A woman has discovered a large python in the lake on her property.

Forrest and team dive into the Anaconda's lair to find the infamous snake.

Snake catcher Julia's first customer discovers an eastern brown snake while gardening. Then, Julia gets caught on the hand by a green tree snake hidden under a fridge. Plus, Julia and her husband John race to remove a python from a retirement home.

Dr. Jeff performs a new surgery to save the life of a family's cherished dog; Dr. Baier treats a class act with a big personality; the Planned Pethood team gives puppy mill pups a second shot at life.

Dr. Jeff treats a skittish Savannah cat with an unusual condition; Dr. Amy helps a beloved dog who was injured chasing a coyote; the team tries to find the owners of a dog rescued on the highway.

Dr. Jeff gives hope to a concerned owner when their dog is diagnosed with cancer; the team cares for a litter of abandoned kittens; Dr. Amy solves the mystery of a beloved cat's painful injury; Dr. Jeff and Hector help a rescued tiger find love.

Julia and her husband John must catch the second most venomous land snake in the world in a cramped laundry room. A snake has invaded a dog breeder's garden full of puppies. A woman has discovered a large python in the lake on her property.

The team travels to Romania to assist with a street dog problem; a deaf dog needs a complex surgery; a wounded European bison takes the team to the mountains.

Snake catcher Julia's first customer discovers an eastern brown snake while gardening. Then, Julia gets caught on the hand by a green tree snake hidden under a fridge. Plus, Julia and her husband John race to remove a python from a retirement home.

Dr. Jeff and his team head to Houston to rescue dogs in the aftermath of devastating floods; in Denver, Dr. Amy treats a cat with a mysterious wound; a young Lab needs emergency surgery after eating something unusual.

Dr. Jeff treats a skittish Savannah cat with an unusual condition; Dr. Amy helps a beloved dog who was injured chasing a coyote; the team tries to find the owners of a dog rescued on the highway.

Julia and her husband John must catch the second most venomous land snake in the world in a cramped laundry room. A snake has invaded a dog breeder's garden full of puppies. A woman has discovered a large python in the lake on her property.

Dr. Jeff gives hope to a concerned owner when their dog is diagnosed with cancer; the team cares for a litter of abandoned kittens; Dr. Amy solves the mystery of a beloved cat's painful injury; Dr. Jeff and Hector help a rescued tiger find love.

Snake catcher Julia's first customer discovers an eastern brown snake while gardening. Then, Julia gets caught on the hand by a green tree snake hidden under a fridge. Plus, Julia and her husband John race to remove a python from a retirement home.

A puppy needs a high-risk surgery; a 3-day-old kitten needs immediate help; a deadly virus halves a puppy's chances at life.

When a young Boxer falls from a second-story window, the team races to the rescue; Dr. Jeff discovers a life-threatening problem in a Great Dane; after a beloved cat is attacked by a mystery animal at night, Dr. Don battles to save his leg.

In 2001, a mysterious half-human, half-animal hybrid bounds across rooftops of New Delhi, running down residents and brutally attacking them; Mungo's investigation attempts to uncover the truth of the Monkey-Man.

Julia and her husband John must catch the second most venomous land snake in the world in a cramped laundry room. A snake has invaded a dog breeder's garden full of puppies. A woman has discovered a large python in the lake on her property.

A merciless predator known as the Genali that prowls the waterways of Borneo, hunting and killing children, could actually be a reticulated python, a crocodile, or even a deadly dragon.

Snake catcher Julia's first customer discovers an eastern brown snake while gardening. Then, Julia gets caught on the hand by a green tree snake hidden under a fridge. Plus, Julia and her husband John race to remove a python from a retirement home.

Dan Cabela explores how the regulated utilization of gators in modern times, through egg harvesting, farming and hunting, helped bring the population back to healthy levels.

Dr. Jeff treats a skittish Savannah cat with an unusual condition; Dr. Amy helps a beloved dog who was injured chasing a coyote; the team tries to find the owners of a dog rescued on the highway.

A species established just after the last Ice Age, the blacktail deer of Vancouver Island offers a genetic population isolated from the mainland; Dan Cabela travels to the island to learn more about their harvesting, conservation and history.

Two dogs are found tied in a backyard without shade; a dog's embedded collar has exposed it's jugular vein.

Dr. Jeff gives hope to a concerned owner when their dog is diagnosed with cancer; the team cares for a litter of abandoned kittens; Dr. Amy solves the mystery of a beloved cat's painful injury; Dr. Jeff and Hector help a rescued tiger find love.

A dog is found dead and two others severely emaciated and suffering from tick fever.

A puppy needs a high-risk surgery; a 3-day-old kitten needs immediate help; a deadly virus halves a puppy's chances at life.

A dog gives birth in an alley and the pups struggle to survive; Tamie Kinsel pleads for the life of an injured bird.

When a young Boxer falls from a second-story window, the team races to the rescue; Dr. Jeff discovers a life-threatening problem in a Great Dane; after a beloved cat is attacked by a mystery animal at night, Dr. Don battles to save his leg.

An X-ray provides surprising evidence in an investigation of a case involving three starving dogs.

In 2001, a mysterious half-human, half-animal hybrid bounds across rooftops of New Delhi, running down residents and brutally attacking them; Mungo's investigation attempts to uncover the truth of the Monkey-Man.

The AHS investigators are asked to help the police in the raid of a rooster-fighting operation; a parakeet is rescued; a dog with a severe leg wound.

A merciless predator known as the Genali that prowls the waterways of Borneo, hunting and killing children, could actually be a reticulated python, a crocodile, or even a deadly dragon.

A dog is rescued after being hog-tied and left to die in a dumpster.

Dan Cabela explores how the regulated utilization of gators in modern times, through egg harvesting, farming and hunting, helped bring the population back to healthy levels.

A species established just after the last Ice Age, the blacktail deer of Vancouver Island offers a genetic population isolated from the mainland; Dan Cabela travels to the island to learn more about their harvesting, conservation and history.

Hidden in large parts of the state, and often protected by heavily armed security, the wardens hunt down illegal marijuana growing sites; three teens are involved in an ATV crash.

Two dogs are found tied in a backyard without shade; a dog's embedded collar has exposed it's jugular vein.

Sergeant Spahr takes on a Boa Constrictor, while aiding Warden Blanchard in the search for an illegal bear meat seller; Warden Buuck finds a bloody campsite and Warden Fitzpatrick takes on an out-of-control moose.

A dog is found dead and two others severely emaciated and suffering from tick fever.

Warden Blanchard demonstrates to a high school student that there is no such thing as a boring day on the job; Warden LaFlamme is promoted.

A dog gives birth in an alley and the pups struggle to survive; Tamie Kinsel pleads for the life of an injured bird.

Features the lives of men and women who are making the Michigan wilderness and landscape a safer place for not only animals, but humans alike.

An X-ray provides surprising evidence in an investigation of a case involving three starving dogs.

Officers safeguard waterfowl, patrol ice fishers and snowmobilers; they also monitor off-road vehicle activity; the Department of Natural Resources relocates a historic lakeside building from an eroding bluff.

The AHS investigators are asked to help the police in the raid of a rooster-fighting operation; a parakeet is rescued; a dog with a severe leg wound.

Officers patrol waterfowl hunters on state lands, investigate potential DUIs and trespassing during firearm deer season, and come together for a charity ice hockey game to support their community.

A dog is rescued after being hog-tied and left to die in a dumpster.

Follow Michigan Conservation Officers as they protect and patrol the most precious natural resources in one of the nation's most remote areas.

Hidden in large parts of the state, and often protected by heavily armed security, the wardens hunt down illegal marijuana growing sites; three teens are involved in an ATV crash.

Officers patrol the Detroit River during walleye season, seizing undersized fish and citing unlicensed anglers; officers check waterfowl hunters and make a late-night stop.

Sergeant Spahr takes on a Boa Constrictor, while aiding Warden Blanchard in the search for an illegal bear meat seller; Warden Buuck finds a bloody campsite and Warden Fitzpatrick takes on an out-of-control moose.

Following Michigan Conservation Officers as they protect and patrol the most precious natural resources in one of the nation's most remote areas.

Warden Blanchard demonstrates to a high school student that there is no such thing as a boring day on the job; Warden LaFlamme is promoted.

Officers patrol waterfowl hunters on state lands, investigate potential DUIs and trespassing during firearm deer season, and come together for a charity ice hockey game to support their community.

Follow Michigan Conservation Officers as they protect and patrol the most precious natural resources in one of the nation's most remote areas.

Officers patrol the Detroit River during walleye season, seizing undersized fish and citing unlicensed anglers; officers check waterfowl hunters and make a late-night stop.

Following Michigan Conservation Officers as they protect and patrol the most precious natural resources in one of the nation's most remote areas.

Sergeant Spahr takes on a Boa Constrictor, while aiding Warden Blanchard in the search for an illegal bear meat seller; Warden Buuck finds a bloody campsite and Warden Fitzpatrick takes on an out-of-control moose.

Officers patrol the Detroit River during walleye season, seizing undersized fish and citing unlicensed anglers; officers check waterfowl hunters and make a late-night stop.

Warden Blanchard demonstrates to a high school student that there is no such thing as a boring day on the job; Warden LaFlamme is promoted.

Following Michigan Conservation Officers as they protect and patrol the most precious natural resources in one of the nation's most remote areas.

A new arrival puts Neil's empire at risk by preparing to reopen the Motherlode mine to tourists; Jeremy Keller begins a new venture to grow his family's farm; two rivals form an unlikely alliance.

Neil seeks help from McCarthy's unlikeliest resident to pursue his mine tour project; Tim gets a reminder of home when Mark pays him a surprise visit; Jeremy treks to the Mother Lode to see what Neil has in store for the town's future.

Neil's new hotel project is over budget, so his investing partner moves to push him out of his oldest business; Jeremy and his boys go on a supply run for hay and return with Jason Lobo; Jenny Rosenbaum makes a discovery.

Plans for tourism at the Mother Lode mine push forward; as the last days of winter loom, McCarthy locals must once again band together.

Neil pushes the town closer to the edge as he begins the first Mother Lode tour; Jeremy and Gary embark on a bear hunt but encounter something even more dangerous.

Jeremy battles rising rivers in search of old growth timber for Neil's lumber project; at the Mother Lode, Neil gambles the entire project on excavating a new entrance; Jenny prepares to bring new life to McCarthy.

The wolfpack is on high alert after mysterious shots cause property damage on the shores of Browntown; the strength of the family is tested as the Browns struggle to finish a salvage job shorthanded.

The Browns hunt and make improvements to Browntown; the family faces an unknown fate in the Alaskan city of Juneau.

The Brown family reunites and plans a trip after thirty long days in Juneau, but an issue plaguing one of the children puts the sanctity of the wolfpack in jeopardy.

The family finally returns to Browntown to reclaim the bush, but the Browns struggle with the principals that make them a Wolfpack.

The Brown family arrives on their new property in a remote region of Washington state, but the long winter wreaks havoc on their first attempts to tame the mountain.

The Browns begin an ambitious barn build, the key to Billy's grand vision; Noah returns reuniting the entire Wolfpack for the first time since Alaska.

Drowning in debt, Jared is doing everything he can to keep his business afloat and his workers employed; when foul play threatens to sink his float camp, Jared fights back as his fallers play a game of dominos to get high-dollar trees to market.

Jared needs to move $1 million of wood down a river to market but can't find anyone brave enough to lead the journey; moving deeper into the wilderness to chase big wood, the road builders prepare a blast to gain access.

In an all-out push to turn a profit at Grizzly Camp, Jared enlists Dave to navigate $200,000 of wood down the deadly Grizzly River; fallers Chris and Jeff tackle steep terrain in search of big wood.

As fire season draws closer and threatens widespread shutdowns, Jared's feeling the heat; he races to salvage logs before it's too late; at Grizzly River, fallers Jim and Rob are called in to help clear a path to one last stand of money trees.

With fire season looming, Jared is under the gun to get all his product out of the woods before it turns to ash; fallers race to drop trees without sparking a backcountry blaze; an alarming discovery at float camp could sink the whole operation.

With just days left to move timber before fire season shuts him down, Jared races to save his float camp from sinking; Dave struggles to send one last haul down Grizzly River; Ross is called to the scene of an accident.

In an all-out push to turn a profit at Grizzly Camp, Jared enlists Dave to navigate $200,000 of wood down the deadly Grizzly River; fallers Chris and Jeff tackle steep terrain in search of big wood.

As fire season draws closer and threatens widespread shutdowns, Jared's feeling the heat; he races to salvage logs before it's too late; at Grizzly River, fallers Jim and Rob are called in to help clear a path to one last stand of money trees.

With fire season looming, Jared is under the gun to get all his product out of the woods before it turns to ash; fallers race to drop trees without sparking a backcountry blaze; an alarming discovery at float camp could sink the whole operation.

With just days left to move timber before fire season shuts him down, Jared races to save his float camp from sinking; Dave struggles to send one last haul down Grizzly River; Ross is called to the scene of an accident.

The Brown family arrives on their new property in a remote region of Washington state, but the long winter wreaks havoc on their first attempts to tame the mountain.

The Browns begin an ambitious barn build, the key to Billy's grand vision; Noah returns reuniting the entire Wolfpack for the first time since Alaska.

Facts about the puli, Thai ridgeback, Lagotto Romagnolo, Peruvian Inca orchid, New Guinea singing dog, and the Karelian bear dog.

Facts and trivia about breeds that some would call ugly.

Tom has a potential disaster on his hands when strong winds flatten his wheat field on the eve of harvest; Ally tries to auction some rusty farm kit to raise some fast cash.

Ian's cattle face an important day as they are tested for bovine tuberculosis; Ally uses Viking woodcraft skills to build a fence for his new camping side business.

Safari Park keepers say goodbye to two elephant brothers; a look at if the San Diego Zoo vets can design a custom shoe for Felix, an excitable three-toed Baird's Tapir; two African penguin chicks grow up and get ready to join the colony.

Mkhaya, the youngest baby elephant in the Safari Park herd, learns to use her trunk; Alba the Andean bear is a potential first-time mom; Zoo vets examine Mandazzi the gorilla; Jeff the snake chaser looks for the elusive costal patch nose snake.

After months of croc wrangling training with Steve Irwin's best friend Wes, Robert, Steve's son, takes the final step in his journey to feed Graham, a huge crocodile at the zoo's famous Crocoseum.

Two strays lead Lizzy and Villalobos employees on a wild goose chase; a grandmother comes to Villalobos looking for another canine companion, but her dog has other plans; Tania pursues her dream to write a children's book.

Lizzy and Elise struggle to rescue a stray dog on the train tracks near the Villalobos warehouse; Mariah enlists help to get to the bottom of Tater's nagging pain; a senior dog with a long medical history finally has her shot at a forever home.

Officers of the Fish and Wildlife police respond to a boating accident, face off against a suspect with a checkered past and arrest a lawbreaker; another officer assists injured wildlife creatures.

Washington's Department of Fish and Wildlife police discover marijuana plants growing on park land, help stop a brush fire, apprehend a known sex offender, and interrupt illegal fishing.

Officers nab a drunk driver as well as a suspect with an outstanding warrant for obstructing law enforcement; illegal fishermen are caught in the act and a homeless man and his puppy meet with an officer.

Officers scramble to save passengers of a capsized boat; confront a suspect on drug related charges; a dead sturgeon floating on the Columbia River is investigated; local tribe makes good use of a bear carcass.

Officers protect orca whales, a mother hen and her ducklings; showdown with a repeat offender; drunk driver is arrested; black market shrimp trafficker is taken down.

Washington's DSFW police catch a man with multiple warrants and chase after an assailant in a large beach rumble; they later deal with a salmon poacher and belligerent fishermen.

Trek across the Namibian desert with the bush elephant and learn how it keeps its cool in a place with little food or shade; discover how this giant consumes specific plants, digs wells and hikes endless dunes in a quest to find precious water.

Wardens track down out-of-state hunters not abiding by the law, and the illegally harvested elk may end up getting confiscated; Wardens get the word out to snowmobilers about required permits.

Wardens monitor hunters who try to start the big game hunting season early; a landowner chooses to press charges against a trespassing hunter; the warden catches a hunter lying, with ballistics evidence to back it up.

Washington's DSFW police catch a man with multiple warrants and chase after an assailant in a large beach rumble; they later deal with a salmon poacher and belligerent fishermen.

Trek across the Namibian desert with the bush elephant and learn how it keeps its cool in a place with little food or shade; discover how this giant consumes specific plants, digs wells and hikes endless dunes in a quest to find precious water.

Wardens track down out-of-state hunters not abiding by the law, and the illegally harvested elk may end up getting confiscated; Wardens get the word out to snowmobilers about required permits.

Wardens monitor hunters who try to start the big game hunting season early; a landowner chooses to press charges against a trespassing hunter; the warden catches a hunter lying, with ballistics evidence to back it up.

Washington's Department of Fish and Wildlife police discover marijuana plants growing on park land, help stop a brush fire, apprehend a known sex offender, and interrupt illegal fishing.

Officers nab a drunk driver as well as a suspect with an outstanding warrant for obstructing law enforcement; illegal fishermen are caught in the act and a homeless man and his puppy meet with an officer.

Preparing a household for a new puppy; selecting the right puppy; basic biology of a dog.

Ocicat; Norwegian forest cat; Selkirk Rex; Abyssinian; Bombay; Havana brown.

Plans change when one of Ian's prized pigs escapes during a weigh-in at the butchery; problems arise when Ally helps Pete harvest barley; a wasp infestation threatens Ian's bee colony; Tom seeks help to save his ancient hedges.

As winter lurks, Ian becomes concerned when his experimental barley crop may not bring enough yield for the pigs; Ally anxiously awaits the camp site's first official review from a travel critic, and dew threatens Tom's crop.

A southern white rhino is pregnant with a calf that could be key in saving a species from extinction; Connor the Malayan tiger has tooth trouble; a new bird keeper learns to feed the shoebill; polar bears exercise their hunting skills on live prey.

A pair of rescued mountain lion cubs are ready for their new habitat; a white rhino undergoes an intense procedure in the hope of saving the species.

Hunter the Sumatran tiger is blind and must be sedated for his annual eye check; the keepers prepare young giraffe Scarlett for a road trip to South Australia, reuniting her with family.

Tia and M2 take to the water to prepare a pit bull for her forever home; a new parolee comes to Villalobos from Boston, hoping stay on track so that he can make his teenage son proud; a stray dog is near death when Lizzy and Heidi find him.

Tia is called in to help rescue five injured dogs from a dog fighting situation; parolee Spencer gets out of jail and returns to Villalobos; Tia asks Spencer to help out with an adoption as a way to keep him on the straight and narrow.

Coddingtown Center in Santa Rosa have tasked the guys with a very special tank; to kick off their new remodel, they want Wayde and Brett to make a tank that pays respects to the heroes that helped the area during the recent wildfires.

MMA fighter Urijah Faber wants Wayde and Brett to create two aquariums for his new gym and wants a little bit of the ocean inside; a couple hosts a party for The Marine Aquarium Convention.

Lifestyle brand Salt Life wants an aquarium even bigger and better than the original; Wayde and Brett are asked to build a custom acrylic waterfall as part of a memorial in Las Vegas.

NFL player Clay Matthews and his wife, Casey, are building their dream home and want a classy tank with subtle references to his career with the Green Bay Packers.

Comic Tracy Morgan wants to be able to swim with his massive sharks, so he wants the guys to tank his entire pool house; a local car dealership wants a new tank in its showroom to make a big splash.

Host Mike Rowe takes a walk on the wild side to work on a reindeer farm, introducing us to these unique animals and the people who make their living looking after them.

Following the vets and volunteers of South Africa who rescue extraordinary animals.

Mike gets dirty at a famous barbecue joint, joins forces with a large-animal veterinarian, and finds himself deep in New Jersey sludge.

Mike heads to a unique dairy farm in Ramona, Calif. where he learns how to milk, care for and breed dromedary camels.

Host Mike Rowe takes a walk on the wild side to work on a reindeer farm, introducing us to these unique animals and the people who make their living looking after them.

Following the vets and volunteers of South Africa who rescue extraordinary animals.

Mike gets dirty at a famous barbecue joint, joins forces with a large-animal veterinarian, and finds himself deep in New Jersey sludge.

Mike heads to a unique dairy farm in Ramona, Calif. where he learns how to milk, care for and breed dromedary camels.

MMA fighter Urijah Faber wants Wayde and Brett to create two aquariums for his new gym and wants a little bit of the ocean inside; a couple hosts a party for The Marine Aquarium Convention.

Lifestyle brand Salt Life wants an aquarium even bigger and better than the original; Wayde and Brett are asked to build a custom acrylic waterfall as part of a memorial in Las Vegas.

The feline that is known as the greyhound of cats; the breed that originated on the Isle of Man; the Siberian that represents Russia; the cat that is the smallest in the world.

Color point shorthair; American curl, Somali, Japanese bobtail, Birman.

Ally is determined that his soya crop will be successful for the final harvest of the year; Ian hopes his heritage skills will help save his centuries-old barn; Tom's grain yield is threatened when it starts overheating.

Bad weather puts Ally in a difficult situation; in the Peak District, they're preparing for the annual sheep sale; the Brewers welcome a new member to the farm.

A hippo named Funani welcomes an adorable addition to the family; the staff raise an orphaned koala joey named Omeo; after developing an innovative milk formula for elephant calves, a team travels to Kenya to monitor the results.

The family prepares Croc One, Steve Irwin's research ship, for a mission to release an endangered sea turtle back to the wild; Scarlett the giraffe reunites with her grandmother; Grub the wild echidna is released from the Zoo's Wildlife Hospital.

A Harley-loving adopter arrives; Mariah and Lizzy struggle to catch a stray pit in New Orleans East; when a litter of black pit-mix puppies are dropped off at the Sanctuary, Tia and M2 turn to social media to adopt them out.

A Pennsylvania prison offers to take 20 dogs from Villalobos; an emaciated pit bull fights for its life; a potential adopter travels from Michigan to meet a dog that stole her heart.

Forrest ventures home to Zimbabwe in search of the mysterious Cape lion; he and the crew navigate the African bush determined to get DNA proof, facing threats of charging rhinos and huge prides of lions.

Forrest returns to the volcanic islands of Indonesia to find the Millers grizzled langur, otherwise known as the Dracula monkey.

In Vietnam, Forrest treks through the world's largest cave searching for the saola in a hidden oasis; this exotic species was only recently discovered, but rumors swirl that The Asian Unicorn might already be extinct.

Forrest is in the Galapagos seeking the Fernandina tortoise, an animal that was only seen once, over 100 years ago; the clues are here, along with an abundance of unique species, raising hopes of a historic discovery.

Forrest is determined to find out if the famously reclusive Ivory Billed Woodpecker still exists; the alligator and poisonous snake infested swamps of Louisiana make for a challenging mission, but he is prepared for anything.

A monstrous Burmese python poses a threat to the children of a day care center; the team extracts venom from a king cobra to be used as antidote.

A 13-foot python takes a dip in a neighborhood pool on Christmas morning.

A pet python kills a family's young daughter; Chuck searches the Everglades for an aggressive Burmese python; a red tail boa is loose in a suburban neighborhood.

Chuck and Ernie head to Costa Rica in search of the black-headed bushmaster, a large, venomous pit viper.

A monstrous Burmese python poses a threat to the children of a day care center; the team extracts venom from a king cobra to be used as antidote.

A 13-foot python takes a dip in a neighborhood pool on Christmas morning.

A pet python kills a family's young daughter; Chuck searches the Everglades for an aggressive Burmese python; a red tail boa is loose in a suburban neighborhood.

Chuck and Ernie head to Costa Rica in search of the black-headed bushmaster, a large, venomous pit viper.

Forrest returns to the volcanic islands of Indonesia to find the Millers grizzled langur, otherwise known as the Dracula monkey.

In Vietnam, Forrest treks through the world's largest cave searching for the saola in a hidden oasis; this exotic species was only recently discovered, but rumors swirl that The Asian Unicorn might already be extinct.

Irish Wolfhound; American Pit Bull Terrier; Gordon Setter; Silky Terrier.

Basenji, Bullmastiff; Shetland Sheepdog; Coton de Tulear; Wonder Dogs, Great Pyrenees; American Eskimo.

Ally brings his farm into the 21st-century, using state-of-the-art machinery to plant his soya crop; the Brewers anxiously await the results of their dairy herd's bovine tuberculosis tests; Joanna's skills are tested when John goes on holiday.

A new pig pen creates drama between the Shimwells and the Dales; Ally races to move a fallen tree from the riverbank; in order to save money, the Brewers bring in big machinery to feed their herd.

Hyena brothers Puru and Tuli prepare to share a habitat with the lions; staff members are ecstatic when zebra Bacari shows signs of being pregnant; Mabel the pygmy hippo welcomes her first bundle of joy.

The staff develops an innovative course of treatment when a cheetah has an injury.

Robert wrangles Utah, a venomous 12-foot king cobra; Dr. Amber visits Tandora to care for wild koalas; back at the zoo, an old injury flares up for Bruce the brolga, a bird that has been in the Irwins' care for 26 years.

Tania tries to rescue a puppy that's hiding beneath a shed; a potential adopter visits Villalobos to find a friend for her dog and she's only interested in the hounds; a beloved employee learns he's finally off parole.

Mariah and Spencer rescue a dog with severe injuries; a parolee gets arrested; a couple hope to find a friend for their bulldog.

Pete has a nine day window to build a Zen-like sanctuary for some old friends in the shadow of the Blue Ridge Mountains in Canton, N.C.

Adventurous Texas family, living on a 200-acre ranch, want a camouflaged treehouse that also serves as a guest house.

Pete builds a 16-foot-high adventure headquarters embedded in three cedar trees and highlighted by a 360-degree wraparound deck for a thrill-seeking couple.

Pete journeys to Kauai to build a sky-wave tree house for a couple who ditched the mainland for a laid-back lifestyle; he transforms a bohemian tree house for two former professional surfers into a masterpiece with a crow's nest 60 feet above ground.

The NTS crew travels to an alpaca farm to build a lodge in the trees inspired by national parks; they create a structure to take in the mountain views with a 50-foot-long cable bridge entrance and a deck devoted entirely to hammock lounging.

Pete makes a treehouse touchdown in Pittsburgh for Antonio Brown, wide receiver for the Pittsburgh Steelers; his plan is to build a luxury skybox with a two story window wall that overlooks a custom basketball court and football field.

Pete tackles the first climb-in movie theater; concessions are served to seating pods through a pulley system and loungers elevate into the trees to give perfect views of the big screen; a tree house for monkeys at the Los Angeles Zoo.

A friend of Pete's has the tree house bug and decides to open a tree house B&B; the classic A-Frame structure has all the amenities and a waterfall that pours from the wraparound deck to the pond below.

The NTS crew travels to an alpaca farm to build a lodge in the trees inspired by national parks; they create a structure to take in the mountain views with a 50-foot-long cable bridge entrance and a deck devoted entirely to hammock lounging.

Pete makes a treehouse touchdown in Pittsburgh for Antonio Brown, wide receiver for the Pittsburgh Steelers; his plan is to build a luxury skybox with a two story window wall that overlooks a custom basketball court and football field.

Pete tackles the first climb-in movie theater; concessions are served to seating pods through a pulley system and loungers elevate into the trees to give perfect views of the big screen; a tree house for monkeys at the Los Angeles Zoo.

A friend of Pete's has the tree house bug and decides to open a tree house B&B; the classic A-Frame structure has all the amenities and a waterfall that pours from the wraparound deck to the pond below.

Adventurous Texas family, living on a 200-acre ranch, want a camouflaged treehouse that also serves as a guest house.