Pete and his crew reminisce about their adventures and answer questions from fans.

Pete and his crew trek to the Blue Ridge Mountains to build a tree house for one of their own, carpenter Mike Reynolds; sitting 16 feet high, it makes the perfect rustic guesthouse to host the raucous Appalachian Breaking Up Christmas tradition.

Pete explores tree houses worldwide that tap into one's inner spirits; a manta-ray-shaped tree house within a Thai jungle; a spirit-soothing retreat hidden in Australia's wilderness.

Pete builds a Swiss Family Robinson inspired treehouse in Michigan to help a man surprise his wife for their anniversary; Inspired but far more advanced than the original.

Pete and his crew reminisce about their adventures and answer questions from fans.

Pete takes on an exciting project for two tastemakers in Maine that includes a towering rooftop crow's nest and a wall of windows.

In Kentucky, Pete creates a treehouse with 17-foot-high ceilings and open-frame timber rafters, allowing a couple with a love of tree-climbing to harness up and dangle from both inside and out.

Lucas turns a landlocked backyard into a Caribbean destination; when the clients demand that he uses specific materials to create a tropical oasis with a sand bottom and saltwater pool, a battle of wills ensues.

Lucas brings in huge rocks to turn a dull patio pool into a natural atrium while remodeling it to make it child-safe.

A massive prehistoric, crocodilian creature known as the Gbahali kills people in Liberia; it may simply be a case of mistaken identity; it could be a super-sized species of crocodile more akin to a dinosaur than anything known today.

Mungo travels to Namibia to investigate the Dog-Headed Pig Monster, a creature that prowls through the night, preying on livestock and children. After an adrenaline-filled investigation in the African bush, Mungo captures the night stalker on camera.

Staff members devise a treatment for a newborn snow leopard cub struggling to walk; a group of surprisingly adorable Rodrigues fruit bats are trained for a big move.

The last polar bear in New York City shows his age, so staff make sure he gets the attention he needs; a trio of red ruffed lemurs prepare for their big debut; a new exhibit is constructed for the hellbender, a giant amphibian with a bad reputation.

To help love bloom between two kiwis, zoo staff build an elaborate hut into which they introduce a pair of potential mates; a King Cobra arrives at the zoo.

Zoo staff make the journey to East Africa to return to the wild thousands of toads they helped rescue from extinction; Utu, the test-pilot giraffe, tries out a new piece of equipment; the bird department works to save the lives of millions of birds.

The future of the American bison depends on a high-stakes race across the country; the reptile staff have their hands full with a diamond rattlesnake that needs to be medicated orally; training a pair of cheetahs to walk the grounds of the zoo.

A canine with a stomach full of forbidden snacks socks it to Dr. G; a fellow member of the veterinary community fears her dog's symptoms might be due to an off-menu meal, or something worse.

A Husky has been baited by a dangerous nibble; Dr. G must be precise with a Boston Terrier believed to have troublesome objects in its ear and nose; an exotic animal charity inspires Ben to harness humor for a good cause.

A canine's countertop gulp puts Dr. G and Ben on the road to a wholly challenging case; a feline who may have nibbled from a first aid kit presents a dire situation; Ben tries to pull his old school dad into the 21st century with mobile digital gear.

A pet owner who is a nurse gets a front-row seat as Dr. G explores a troublesome appetite; a feline at risk for a dangerous blockage means a high-pressure game of cat and mouse.

Dr. G gets tied up as he unravels the cause of Ivan the cat's questionable mood; a fellow veterinarian calls for help when her beloved Poodle's cough points to foreign material in an unusual place.

One feline has an appetite that's shockingly on the money, while another's taste for stringy oddities appears to be insatiable; while Ben is back home visiting family, an exotic bird with questionable peckishness puts Dr. G out of his comfort zone.

An abandoned puppy is found with a broken leg; the team cares for a seriously ill Boston Terrier; doctors head out to treat rescued pigs.

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.

An emergency surgery yields a surprising discovery; treating a goat that has been kicked by a horse; a couple travel a long distance to fix their dog's shattered leg; treating an injured ostrich.

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.

Dr. Dee leads a marathon spay and neuter clinic at a laundromat in Ruby, Alaska; Dr. Dee struggles to deliver a calf at one of the largest cattle ranches in the state.

Dr. Dee's dog may have neurological damage; a horse castration becomes complicated; back at the clinic, a potential case of animal neglect may not be what it seems.

An emergency surgery yields a surprising discovery; treating a goat that has been kicked by a horse; a couple travel a long distance to fix their dog's shattered leg; treating an injured ostrich.

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.

Dr. Dee leads a marathon spay and neuter clinic at a laundromat in Ruby, Alaska; Dr. Dee struggles to deliver a calf at one of the largest cattle ranches in the state.

Dr. Dee's dog may have neurological damage; a horse castration becomes complicated; back at the clinic, a potential case of animal neglect may not be what it seems.

A canine's countertop gulp puts Dr. G and Ben on the road to a wholly challenging case; a feline who may have nibbled from a first aid kit presents a dire situation; Ben tries to pull his old school dad into the 21st century with mobile digital gear.

A pet owner who is a nurse gets a front-row seat as Dr. G explores a troublesome appetite; a feline at risk for a dangerous blockage means a high-pressure game of cat and mouse.

Dr. G gets tied up as he unravels the cause of Ivan the cat's questionable mood; a fellow veterinarian calls for help when her beloved Poodle's cough points to foreign material in an unusual place.

One feline has an appetite that's shockingly on the money, while another's taste for stringy oddities appears to be insatiable; while Ben is back home visiting family, an exotic bird with questionable peckishness puts Dr. G out of his comfort zone.

Lucas Congdon and his crew are tasked with creating a jungle feel in a suburban backyard.

Lucas creates an outdoor water room in which a mermaid could live; former clients that love the ocean want to remodel their tiny pool that sits yards away from the Gulf of Mexico.

A suspicious encounter in a quiet neighborhood leads wildlife agents to a black market venison sale. A routine boating check ends with a wanted man in handcuffs, and agents launch a massive search for a 93-year-old boater lost.

When a pair of illegal hunters flee by truck, wildlife agents set out to track them down; heaps of trash dumped at a fishing spot lead to a suspect who denies any wrongdoing; damning evidence in a truck bed catches a hunter in a lie.

LDWF biologists on a conservation mission get hands-on with black bear cubs, facing a protective mama bear; hunters get caught using a banned method to hunt ducks; wildlife agents stake out after dark for a felon with an illegal gun.

A suspicious man fleeing on the levee after dark puts wildlife agents in danger; a first-time bowhunter could lose his kill over a major violation; agents question a duck hunter with an attitude who seems to be hiding something.

A suspicious driver leads wildlife agents on a high-speed chase through a national forest; goose-hunting guides are caught in a repeat offense; a routine stop turns treacherous when a suspect is discovered concealing a firearm.

A bizarre discovery inside an abandoned cooler escalates a littering probe; wildlife agents patrolling in dense fog are thrown into a dangerous encounter, and a burglary investigation uncovers an illegally taken deer.

Lt. Col. Slater balances his prison duties with his responsibilities as a single father; former rodeo champ Cracker risks serious injury for another shot at glory; a local newspaper launches a smear campaign against Warden Cain.

Warden Cain unleashes the hounds when a prisoner attempts a nighttime escape; inmate Jesse wants to handle more responsibility; inmate Oliver asks permission for a wedding ceremony in Angola.

The convicts prepare for the final rodeo of the season; inmate James learns that he has been granted early release from Angola.

A new inmate to Angola finally meets his grandfather, a prisoner also serving a life sentence; Lt. Col. Slater reconnects with a dying inmate.

The day takes a grim turn when wardens step into the world of "CSI" to determine where a deer was killed; a poaching-loving family is finally going to trial after discovering their responsibility behind multiple animal deaths.

As wardens attempt to catch a convicted game violator, another case forces them to work late into the night; region four officers spring into action when a 1,000-pound bully stirs up trouble.

Wardens investigate decapitated deer and a poached bull elk while battling a winter storm; they join forces in a high-speed pursuit of a decoy shooter and unmask a hunter's deception.

An intoxicated woman surprises a warden when she reveals she's pregnant; wardens investigate a veterinarian who claims he killed a bear in self-defense.

Wardens investigate decapitated deer and a poached bull elk while battling a winter storm; they join forces in a high-speed pursuit of a decoy shooter and unmask a hunter's deception.

An intoxicated woman surprises a warden when she reveals she's pregnant; wardens investigate a veterinarian who claims he killed a bear in self-defense.

The convicts prepare for the final rodeo of the season; inmate James learns that he has been granted early release from Angola.

A new inmate to Angola finally meets his grandfather, a prisoner also serving a life sentence; Lt. Col. Slater reconnects with a dying inmate.

Facts and trivia about Dalmatians, Siberian huskies, German Shorthaired pointers, Pomeranians and Havanese.

Facts and trivia about English sheepdogs, chow chows, toy fox terriers, Brittany spaniels, and miniature schnauzers.

The new season introduces a new satellite shelter for Villalobos in nearby Assumption Parish.

Tia interviews a woman with a deadly past, who could become VRC's first-ever female parolee; Lizzy and Heidi save a tiny dog from the train tracks; veteran adopters Edie and Dennis return to Villalobos seeking their next senior canine.

As a hurricane bears down on VRC, Tia and the crew race to get dogs to safety; Mariah takes the reins for her first solo wolfdog rescue; Lizzy and Earl help a music-loving Kentucky couple find the perfect dog to join their karaoke nights.

For an adopter, a dog rescued from the cane fields seems heaven-sent.

Tia and Lizzy answer a distress call from a Mississippi shelter and take on eight dogs in desperate condition; M2 holds down the fort at VRC while juggling life as a mom of two; Mariah finds the perfect home for her special-needs foster dog Rant.

Bindi swims alongside whale sharks, assisting with research efforts on the world's largest and least understood fish; Robert works to save an echidna that's tightly trapped under a fridge; Terri joins a close-up exam on a grizzly.

Terri helps prepare the zoo's new baby rhino, Carrie, to receive a lifesaving vaccine; Robert is on a rescue mission to save two black swans in very bad shape; Bindi tries to determine if a cranky wombat named Poa might be pregnant.

Robert feeds 44 hungry alligators, all at the same time; Terri helps examine Kaitlyn the tiger and makes a thrilling discovery; Bindi follows the heartbreaking story of her old friend, Zambezi the zebra.

Robert wrangles western diamondback rattlesnakes in Arizona for the first time, learning techniques passed down by his dad; Terri helps save some of the hospital's tiniest patients, three baby feathertail gliders; Bindi chats with Occa the cockatoo.

Terri returns to her hometown in Oregon to help Brady, a cougar in need of a vital health check; at the zoo, Robert is on a mission to rescue Oscar, a small bird with a big attitude; Bindi bathes an echidna with bad skin allergies.

Robert races to safety when a croc called Casper attacks during a feed; Tragedy strikes after urgent repairs begin on the Rainforest Aviary, and Bindi hand-raises a possum joey called Bonnie; Later, baby Grace receives a surprise honor.

Terri responds to the call when Daniel, a very special wallaby, becomes severely injured and cannot walk; Robert and Chandler catch some waves before taking a road trip to pick up a new Komodo dragon; Bindi checks in on Tallbert the giraffe calf.

Era tries to survive a brutal winter; Ariel joins in the search to find a missing friend; Sarah Fraher attempts a difficult landing to aid a pilot; Ponts tries an emergency medical drop.

A harsh winter wreaks havoc on Era's Fleet; Sarah Fraher's aircraft door opens mid-flight.

The village of Wainwright loses its water supply; solar flares put Ponts and Ben in harm's way; a criminal is on the loose in Unalakleet.

The Iditarod dog sled race begins; Doug Steward lands on a runway that is melting; a search for lost snow-machiners.

Era tries to survive a brutal winter; Ariel joins in the search to find a missing friend; Sarah Fraher attempts a difficult landing to aid a pilot; Ponts tries an emergency medical drop.

A harsh winter wreaks havoc on Era's Fleet; Sarah Fraher's aircraft door opens mid-flight.

The village of Wainwright loses its water supply; solar flares put Ponts and Ben in harm's way; a criminal is on the loose in Unalakleet.

The Iditarod dog sled race begins; Doug Steward lands on a runway that is melting; a search for lost snow-machiners.

Robert wrangles western diamondback rattlesnakes in Arizona for the first time, learning techniques passed down by his dad; Terri helps save some of the hospital's tiniest patients, three baby feathertail gliders; Bindi chats with Occa the cockatoo.

Terri returns to her hometown in Oregon to help Brady, a cougar in need of a vital health check; at the zoo, Robert is on a mission to rescue Oscar, a small bird with a big attitude; Bindi bathes an echidna with bad skin allergies.

Fun facts and trivia about Australian Shepherds, Xoloitzcuintlis, Korthals Griffons, Pekingese and Chesapeake Bay Retriever.

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

Warden Cain and his staff make the difficult decision to evacuate Angola when the Mississippi River's rising waters threaten to flood the penitentiary.

An inmate prepares for a reunion with the son he hasn't seen in a decade; teams are put on alert when narcotics infiltrate the penitentiary.

Warden Cain unleashes the hounds when a prisoner attempts a nighttime escape; inmate Jesse wants to handle more responsibility; inmate Oliver asks permission for a wedding ceremony in Angola.

Young convict Redneck prepares for his first rodeo ride, while an unruly inmate may not get his shot at glory; a suicide is reported in the dangerous punishment unit known as Camp J.

A new inmate to Angola finally meets his grandfather, a prisoner also serving a life sentence; Lt. Col. Slater reconnects with a dying inmate.

Lt. Col. Slater balances his prison duties with his responsibilities as a single father; former rodeo champ Cracker risks serious injury for another shot at glory; a local newspaper launches a smear campaign against Warden Cain.

Lt. Col. Slater is assigned to run a public horse auction; Warden Cain tries to keep order when inmates stage a hunger strike.

Officer Hannett patrols for ice fishermen while Lt. Boudreau investigates a hunter who shot towards a road; Officer Holmes deals with a raccoon hiding in a warm chimney; Officer St. Pierre goes on his first dive recovery under the ice.

The dive team assists at an event in Hampton Beach; Officer Courtney patrols the area's clam flats; Officers Hannett and Holmes patrol snowmobile activity across the state; Officer Demler helps a bobcat that's been injured by a porcupine.

A busy day at the state's largest ice fishing derby; Officer Canfield searches for the owner of a frozen fishing line; Major Juneau leads a mountain rescue; Officer McKee clocks the speed of snowmobiles; Officer Cyrs checks on a stuck moose.

Lt. Boudreau teams up with Trainee Masucci to track down a turkey hunter who may have shot from the road; when an animal release goes south, Officer Hannett lends a hand; Officer Canfield races to catch a trespassing dirt biker.

During a busy winter weekend, Lt. Boudreau encounters kite skiers, an illegal fire sled and a vandalized bob-house; Officer Canfield searches for a deer with an arrow in its head; Officers Demler and Towne head out on a treacherous mountain rescue.

Officer Bronson questions a hunter who shot a deer without having the proper permit; while Officer Demler runs radar on a popular snowmobile trail, Sgt. Lucas investigates a suspicious deer kill site; Officer Cyrs responds to a snowmobile accident.

Officer Crouse responds to a call about a nuisance raccoon; Officer Towne searches for a deer attacked by coyotes; Officer Hannett monitors a suspicious fisherman; Officer St. Pierre responds to a call about an impaired driver.

Officers Bronson and Towne get more than they bargained for with a speeding snowmobiler; the K-9 unit performs winter training; Officer MacFadzen patrols an ice drag racing event; Officer Cyrs heads into the woods to investigate a hit-and-run.

Nature lovers show up for Discover Wild New Hampshire Day; Officers conduct an undercover surveillance; Officer McKee rescues a starving owl from the side of the road; on Mount Monadnock, a perilous rescue of an injured hiker.

Officer Bronson questions a hunter who shot a deer without having the proper permit; while Officer Demler runs radar on a popular snowmobile trail, Sgt. Lucas investigates a suspicious deer kill site; Officer Cyrs responds to a snowmobile accident.

Officer Crouse responds to a call about a nuisance raccoon; Officer Towne searches for a deer attacked by coyotes; Officer Hannett monitors a suspicious fisherman; Officer St. Pierre responds to a call about an impaired driver.

Officers Bronson and Towne get more than they bargained for with a speeding snowmobiler; the K-9 unit performs winter training; Officer MacFadzen patrols an ice drag racing event; Officer Cyrs heads into the woods to investigate a hit-and-run.

Nature lovers show up for Discover Wild New Hampshire Day; Officers conduct an undercover surveillance; Officer McKee rescues a starving owl from the side of the road; on Mount Monadnock, a perilous rescue of an injured hiker.

The dive team assists at an event in Hampton Beach; Officer Courtney patrols the area's clam flats; Officers Hannett and Holmes patrol snowmobile activity across the state; Officer Demler helps a bobcat that's been injured by a porcupine.

A busy day at the state's largest ice fishing derby; Officer Canfield searches for the owner of a frozen fishing line; Major Juneau leads a mountain rescue; Officer McKee clocks the speed of snowmobiles; Officer Cyrs checks on a stuck moose.

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

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

An itchy pig with a mean bite tries to take a chunk out of Dr. Blue, while Dr. Lavigne uses a unique method to fix a small dog's broken leg; Dr. Ross helps a rescue dog whose injuries may have gone untreated for too long; the docs go for gold.

Yuki the bulldog ate something she shouldn't have, and it's up to Dr. Blue to find it; Dr. Lavigne and his wife learn how to do alternative home care on Suki, an amputee rescue cat his family adopted.

Dr. Blue recruits Dr. Ross to tackle two wolf spays at a local sanctuary; Dr. Lavigne performs surgery on a pit bull with a torn ACL; new vet Dr. Fedke treats a cat with a creepy, crawly injury.

A couple is desperately seeking the help of Jackson for their feuding cats, Bitten and Chompy; a couple who recently moved in together are having second thoughts because of the vicious behavior of the cat, Achilles.

Gus, a frisky feline has a huge appetite and eats everything in sight; rescue cat Stella has left her owner single because she has chased off every date with her brutal behavior.

Terror cat Mufasa is threatening the planning of an engaged couple's perfect wedding; Roscoe is a menace, knocking things off the shelves and destroying furniture while trying to escape.

A couple is at their wits end after their cat, Gracie has terrorized them for nearly two years; a mother-daughter duo are at a loss after adopting their cat Miley who attacks them and their two dogs on a daily basis.

Addie has been roughhoused like a dog, transforming her into an aggressive biter; Kitty, a Russian Blue, has been treated like a princess by her owner's boyfriend, but it's not enough.

Finn's incessant crying often wakes up his owners, Lara and David. The couple argues about locking him up in their guest bathroom, also known as "kitty jail"; Nancye and James are at the end of their rope, as their cat Molly chews on everything.

Jackson works with a guardian, Tara, whose traumatic experience with her previous cat affects her currently troubled cat, Cali; Jackson must deal with guardian Kurtis and his cat, Kurtis Jr., before the guardian has his feline namesake declawed.

A former member of the Amish and an Australian fitness coach attempt to survive 21 days together in the harsh Colombian jungle.

A photographer and an engineer believe they have what it takes to survive 14 days in Limpopo, South Africa; after 10 days without food, these fans question their ability to make it to the end.

In an international tribes challenge, one survivalist must cope with menstruation in the middle of the African bush.

Two foreigners try to become the first survivalists to endure 21 days on U.S. soil; rattlesnakes, unfamiliar terrain and plummeting temperatures threaten to send them back across the pond.

In an international tribes challenge, one survivalist must cope with menstruation in the middle of the African bush.

Two foreigners try to become the first survivalists to endure 21 days on U.S. soil; rattlesnakes, unfamiliar terrain and plummeting temperatures threaten to send them back across the pond.

Finn's incessant crying often wakes up his owners, Lara and David. The couple argues about locking him up in their guest bathroom, also known as "kitty jail"; Nancye and James are at the end of their rope, as their cat Molly chews on everything.

Jackson works with a guardian, Tara, whose traumatic experience with her previous cat affects her currently troubled cat, Cali; Jackson must deal with guardian Kurtis and his cat, Kurtis Jr., before the guardian has his feline namesake declawed.

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.

Hiking in the Montana mountains, trail engineer Todd Orr is attacked twice by grizzly bear protecting her cubs; during a vacation in the Bahamas, Tiffany Johnson is snorkeling when she finds herself face-to-face with a tiger shark.

Diver Tim Saxon films underwater at the Great Barrier Reef and gets stung by an Irukandji jellyfish, one of the world's most venomous animals; a grizzly bear attacks forester George Knoll in the remote Great Bear Rainforest.

A grizzly bear charges taxidermist Wilf Lloyd while he hunts elk with his son-in-law in the Canadian Rocky Mountains; miles from shore, diving 180 feet below the surface, spearfisher Anthony Segrich finds a bull shark charging toward him.

The Venom One team stages a rescue when deadly bees threaten an elderly living facility.

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.

Floridians face threats from carnivorous African Nile monitor lizards, red-tailed boa constrictors and poisonous Eastern diamondbacks.

Wade comes face-to-face with one of South America's greatest freshwater fighting fish.

Jeremy Wade returns to the Okavango Delta to re-investigate a predatory carnivore that may have mauled over 100 victims of a capsized boat; to discover the truth, Jeremy offers himself up as live bait.

Jeremy Wade investigates rumors of a twenty-foot lake monster that attacks people; with snakes, freshwater sharks and giant sturgeon unlikely possibilities, the answer as to what it is drives Jeremy crazy.

Jeremy Wade is lured to the shores of the Mekong River in Cambodia to search for a monstrous fish that has mauled, blinded, killed and most recently sliced clean through a young man's testicle.

Jeremy Wade fights through tropical storms and dangerous jungles to search for a Fijian killer that has been part of the local folklore for years, but there may be more than one.

A recent fatal incident in the Alaskan wilderness sends Jeremy on a quest for possible suspects that culminates in a showdown with an unexpected, bizarre water beast.

On the tropical island of Sulawesi, Indonesia, a tourist snorkeler and several local fishermen have been killed and injured by a mysterious sea creature that impales its victims; Wade travels to the scene to investigate.

Traveling from London to Greenland and on to Norway, Wade follows the trail of an unknown sea monster; fishing through ice to extreme depths, he attempts to reel in this monster before the full fury of an Arctic storm hits.

Jeremy Wade investigates a case in Nepal that sounds strangely familiar -- a lone fisherman dragged off his feet and into a mountain river by the original river monster, the goonch catfish.

A recent fatal incident in the Alaskan wilderness sends Jeremy on a quest for possible suspects that culminates in a showdown with an unexpected, bizarre water beast.

On the tropical island of Sulawesi, Indonesia, a tourist snorkeler and several local fishermen have been killed and injured by a mysterious sea creature that impales its victims; Wade travels to the scene to investigate.

Traveling from London to Greenland and on to Norway, Wade follows the trail of an unknown sea monster; fishing through ice to extreme depths, he attempts to reel in this monster before the full fury of an Arctic storm hits.

Jeremy Wade investigates a case in Nepal that sounds strangely familiar -- a lone fisherman dragged off his feet and into a mountain river by the original river monster, the goonch catfish.

Jeremy Wade returns to the Okavango Delta to re-investigate a predatory carnivore that may have mauled over 100 victims of a capsized boat; to discover the truth, Jeremy offers himself up as live bait.

Jeremy Wade investigates rumors of a twenty-foot lake monster that attacks people; with snakes, freshwater sharks and giant sturgeon unlikely possibilities, the answer as to what it is drives Jeremy crazy.

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

Questions are answered about the French Bulldog, Poodle, Airedale, Chihuahua and Labrador.

A staff member heads to the Marine Mammal Center in California to help in rehabilitation efforts of elephant seals; African penguins Charlie and Lizzie have been together for 25 years, Charlie is having issues with his eyes; a piranha needs surgery.

The team welcomes two rescued southern sea otter pups Mara and Gibson, from the California coast; young ruddy ducks arrive at the aquarium and are introduced to their new habitat. Nandi, the aquarium's smallest manta ray, is due for a checkup.

Polka, a bottlenose dolphin, has a raspy voice and needs to see the doctor to get the all-clear; staff excitedly prepare for the upcoming puffin breeding season; two wobbegong sharks are due for a checkup; a curious box turtle goes for a walk.

Revisiting tanks Wayde and Brett have created for celebrities, including comic Tracy Morgan, actor Neil Patrick Harris and rock band Kiss.

Wayde and Brett create unique aquariums for a luxury apartment complex and a knee brace company; Wayde hopes to energize his employees by holding a special contest.

Wayde and Brett are challenged by a Southern California resort to build a tank inside the trunk of an oak tree; a Halloween store wants a coffin aquarium.

A rehabilitation facility wants a tank with a spine insert; medical practitioners desire an underwater forest fish tank for their office.

Dreams are coming to life in Oregon as Pete builds for Marlene, an 81-year-old woman who is finally getting one of her greatest wishes fulfilled: a treehouse; Marlene is giddy with excitement for this new adventure.

Pete answers the call of duty to build a tree house in Pennsylvania that focuses on the children of Marines; cargo netting off the deck provides an exciting way to enter, while even more nets inside form a bridge to access a private loft space.

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.

Pete partners up in Utopia, Texas, for his first joint venture: a tree house bed-and-breakfast built for romance; a French-inspired chapel of love has a 25-foot steeple and the biggest bathroom Pete has built to date.

Pete Nelson seeks out the most wonderful arboreal structures in the world, highlighting how each has been swayed by different artistic movements, while also appreciating function and form.

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.

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.

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.

Pete Nelson seeks out the most wonderful arboreal structures in the world, highlighting how each has been swayed by different artistic movements, while also appreciating function and form.

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.

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.

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.

Pete answers the call of duty to build a tree house in Pennsylvania that focuses on the children of Marines; cargo netting off the deck provides an exciting way to enter, while even more nets inside form a bridge to access a private loft space.

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.

Lucas builds a family size water park in a neglected backyard that includes a waterslide and double-decker outdoor patio.

Lucas and his crew encounter several design firsts as they create a Mexican-inspired resort in a Venice, Fla. backyard.

Treating their dog's allergy plunges a young couple deep into debt; a hognose snake is reluctant to eat; early plans for a dog sanctuary are riding on a successful, well-attended auction.

A dog named Goobs wins the RAPS team's hearts; Shadow, a Pitbull mix, has a potentially cancerous lump on his neck; Lilou the cat gets a diagnosis to explain her aggressive and unusual behavior; Karen and her team of pickers hit a jewelry jackpot.

A mystery illness afflicting Ceelo the Doberman puppy has the entire RAPS vet team in detective mode; Cardamom, a Shar Pei puppy, demonstrates why cute can be complicated; the pickers uncover a royal treasure in one of the abandoned bins.

The slow loris has a tiny window for breeding, so staff anxiously help a potential pair connect; the veterinary team develop ground-breaking techniques to treat the stoic pigeons; an okapi with a limp gets a helping hand.

The squirrel monkeys play hard-to-get with the Children's Zoo's keepers; a pair of Komodo dragons meet for the first time, with explosive results; the Inca terns prepare for their first big flight.

The brown bears keep tearing up their exhibit, leaving zoo staff scrambling for a solution; Armani the aardvark gets treated for a tooth infection which has dampened her enthusiasm for digging; a group of burrowing owls prepare to move.

Trust and experience are put to the test when an elephant requires delicate veterinary treatment from her keepers; endangered pink pigeons need all the help they can get to produce offspring; Monty the adorable otter needs to visit the dentist.

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.

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.

Dr. Jeff fights to save a pit bull after a rattlesnake bites it; the team battles to save a cherished cat rescued from an apartment fire; Dr. Amy performs emergency surgery when a car hits a girl's beloved Chihuahua.

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 performs surgery on Slash, a dog who can't keep his food down and weighs 20 pounds less than he should; Winter the cat has a bloody wound on his side.

Dr. Jeff must perform a rare surgery to save a pup with a deadly illness; a young pregnant woman counts on Dr. Amy to help her badly injured cat; Dr. Jeff and the team head to a wildlife sanctuary to treat a pride of lions.

Dr. Jeff helps a remote town in Colorado overwhelmed by feral cats; a staff member's beloved dog needs emergency surgery; Dr. Baier gives some injured birds of prey a second chance; Jeff races to save the life of a family's precious Chihuahua.

A local radio station helps Dr. Dee find a forever home for a special needs dog; cattle turns hostile during castration; Dr. Dee examines a recently awakened black bear.

Dr. Dee takes care of her mother while dealing with her busy clinic; emergency surgery on a Yorkie puppy; puppies are rescued from remote villages in the hopes of finding them homes.

Dr. Jeff must perform a rare surgery to save a pup with a deadly illness; a young pregnant woman counts on Dr. Amy to help her badly injured cat; Dr. Jeff and the team head to a wildlife sanctuary to treat a pride of lions.

Dr. Jeff helps a remote town in Colorado overwhelmed by feral cats; a staff member's beloved dog needs emergency surgery; Dr. Baier gives some injured birds of prey a second chance; Jeff races to save the life of a family's precious Chihuahua.

A local radio station helps Dr. Dee find a forever home for a special needs dog; cattle turns hostile during castration; Dr. Dee examines a recently awakened black bear.

Dr. Dee takes care of her mother while dealing with her busy clinic; emergency surgery on a Yorkie puppy; puppies are rescued from remote villages in the hopes of finding them homes.

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.

Dr. Jeff fights to save a pit bull after a rattlesnake bites it; the team battles to save a cherished cat rescued from an apartment fire; Dr. Amy performs emergency surgery when a car hits a girl's beloved Chihuahua.

It's a lifelong dream for a retiring military couple in Huntsville, Ala. to have a dream pool; Lucas designs a gigantic grotto, enclosed spa and the craziest waterfall he has ever built.

Couple requests a zen space to relax in their Parrish, Fla. home; the crew tries to keep their zen in check.

A new cadet almost gets run down; Warden Boone investigates an armed trespasser; a Mexican boat in U.S. waters gets investigated for illegal nets.

Game wardens patrol the Rio Grande in search of an unidentified body; Warden Powell investigates an unusual deer case; Wardens Boone and Ataya respond to a call about mountain lions being shot in a woman's backyard.

When the Texas game wardens encounter a sick bald eagle, it becomes a race against time to ensure its survival; while checking deer camps near the border of Mexico, a warden finds himself in a high-stakes foot pursuit.

Texas Game Warden Benny Richards is committed to conserving Texas wildlife; Game Warden Albert Flores enforces fishing laws; Game Warden Jennifer Provaznik schools anglers; Game Warden Jayme Deschaaf makes sure dove hunters follow the laws.

The game wardens' marine team searches a foreign cargo vessel in the Gulf of Mexico; a man gets suspected of poaching 15 deer out of season; the game wardens discover a large marijuana growing operation outside of Dallas.

On the Gulf, hundreds of sea turtles face death during a cold spell; a tip leads to a raid on a deer poacher in central Texas; wardens crack down on white-tailed deer hunters; in southwest Texas, mule deer season is in full swing.

Warden Tommy Johnson pays a surprise visit to the home of a known poacher; Warden Mike Boone relocates an alligator snapping turtle; Wardens Inman and Eddins get a poacher to confess; Warden Jennifer Provaznik educates fishermen.

Wardens investigate decapitated deer and a poached bull elk while battling a winter storm; they join forces in a high-speed pursuit of a decoy shooter and unmask a hunter's deception.

Region 4 wardens have their hands full when a string of deer cases is reported to the station; suspicions rise when wardens stop a truck full of Christmas trees at the beginning of November.

Wardens find that a group of litterbugs is guilty of even more violations, and the Sheriff's office has to be called in; Wardens catch over-the-limit anglers in the act.

When the openings of both the bighorn sheep and archery elk hunting seasons overlap, wardens catch illegal hunters in the act; off-roaders cause some serious land damage; on the 4th of July seemingly intoxicated boaters give wardens a difficult time.

Wardens are on high alert during Montana's opening day of hunting season; wardens are determined to track down a gray pickup truck responsible for an illegal deer kill.

A warden is skeptical when a bow hunter without a license claims he's only elk calling. Hunters find out the hard way because they're on private property, and when an endangered grizzly bear is shot, wardens come out in full force.

Stories aren't adding up when wardens go to check if a group has valid fishing licenses; Wardens confront anglers fishing in closed water and crack down on anglers during the limited paddlefish season.

A warden is skeptical when a bow hunter without a license claims he's only elk calling. Hunters find out the hard way because they're on private property, and when an endangered grizzly bear is shot, wardens come out in full force.

Stories aren't adding up when wardens go to check if a group has valid fishing licenses; Wardens confront anglers fishing in closed water and crack down on anglers during the limited paddlefish season.

Region 4 wardens have their hands full when a string of deer cases is reported to the station; suspicions rise when wardens stop a truck full of Christmas trees at the beginning of November.

Wardens find that a group of litterbugs is guilty of even more violations, and the Sheriff's office has to be called in; Wardens catch over-the-limit anglers in the act.

Hamsters; guinea pigs; geckos; rabbits; parrots and ferrets.

Pet pig; hedgehog; pygmy goat; capybara; mini donkey; skunk.

M2 leaps into action to save a dog roaming the cane fields before it runs afoul of harvest machinery; Tia and Earl help match veteran adopter Kim with a senior dog; Toney and Emily make every day count for hospice dog Chester.

As the new VRC location nears completion, Tia and the team prep to welcome the public for a volunteer day; an Ohio couple feels a powerful connection with deaf dog Ben; Mariah draws on her passion for motorcycles to honor her beloved pit bull Tater.

Earl returns from rehab, hoping to rebuild his life working with the dogs; a couple comes looking for a dog who can handle crowded streets of NYC; Lizzy rescues a dog after a confrontation with the owner who abandoned it.

When a dog that was adopted out mysteriously appears in a shelter in Mississippi, Tania and Earl head to the rescue; parolee Joe must separate two stray dogs fighting outside the shelter, leaving him shaken; hound dog adoption doesn't go as planned.

Tia attempts to rescue a stray, but her leg injury holds her back; new parolee Mike struggles to balance working and being a parent; a family comes to Villalobos hoping to adopt a dog for their daughter, but finding a good match proves a challenge.

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.

Bindi and the keepers ready Sophie the Baby Giraffe for her first steps into her enclosure; Robert helps to hand-raise Melman the Kangaroo; Terri oversees a health check for Ravi the Red Panda.

The Irwins travel to South Africa, where Terri helps release a wild leopard; Bindi learns from the all-female anti-poaching squad, The Black Mambas; Robert attempts to photograph Africa's big five game animals.

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.

Robert and Indah, a Komodo dragon, participate in an exciting research experiment; Terri tries to save a koala joey with a zero percent chance of survival; Bindi visits friends at childhood favorite spot Oregon Coast Aquarium.

As Bindi celebrates her 21st birthday, she gets a surprise proposal from her boyfriend, Chandler; things get dangerous as Robert wrangles gators in thick mud; Terri helps with the momentous birth of a baby white rhino.

Robert and Terri take to the skies to release three rescued sea turtles near the Great Barrier Reef. Bindi anxiously awaits the birth of the zoo's first tiger cub in years. Richie helps a baby wallaby in his struggle for survival.