Andrea Schlake volunteers at an animal sanctuary when a chimpanzee escapes its enclosure and chases her down; a great white shark knocks surfer Todd Endris off his board and attacks him.

Twenty miles into a marathon in a remote part of New Mexico, Karen Williams finds herself caught between a bear and her cub; Steve Campbell is working on an oil pipeline in Alberta, Canada, when a mountain lion attacks him.

Wayne Petteway is attacked by an alligator while checking crab pots with his brother in North Carolina; in Arizona, Peter Baca is camping with his girlfriend and baby son when he is awoken by something attacking him through the walls of the tent.

A bull shark attacks a triathlete who is training in Alabama; a father fights to survive after a rattlesnake bites him; a giraffe attacks a couple in Zambia; a girls' trip turns deadly in Cancun.

Andrea Schlake volunteers at an animal sanctuary when a chimpanzee escapes its enclosure and chases her down; a great white shark knocks surfer Todd Endris off his board and attacks him.

After numerous credible eyewitness accounts of the Tasmanian Tiger in Australia, James Cook University has researchers on the move; Forrest joins their study before heading deep into the Cape York Peninsula.

Forrest Galante visits the island of Java in Indonesia to look for the Javan Tiger; this exotic predator was declared extinct in 2003, but park rangers and locals have had recent sightings and are collecting evidence of its existence.

Amanda and her kids travel to Hawaii, where they meet dogs perfect for Panda Paws: a deaf mother-daughter Catahoula duo, Loco Moco, a puppy who may be blind, and Super Scootie, a senior in need of a home after years of neglect.

Amanda faces one of her most challenging rescues when a puppy arrives with serious neurological issues; Panda Paws helps a Chihuahua terrier mix bounce back after only having the use of one leg before finding him a forever family.

The Irwins take action when a croc becomes ill.

Antonio builds a backyard, temperature-controlled clubhouse with separate self-sustaining tanks and a common climbing area for two bearded dragons, and a cool hangout spot for the family.

A rescue organization needs to stimulate its 200 animals which include sheep, cows, pigs, horses, a llama and an emu, so Antonio designs a stunning build to get the residents active and moving.

Jackson enters the Santé D'or shelter intent on helping an over-aggressive shelter cat named Pigpen. However, by the time he leaves, Jackson is ready to take on the challenge of converting Santé D'or into a new shelter concept.

Scout fears his tormentor, Caramel, to the point that he literally lives inside a kitchen cabinet; a woman adopts a hybrid Bengal cat who can use the toilet but can't otherwise keep still.

Tia contends with a shocking rescue and a surprise animal-control inspection.

Tia's daughter faces a difficult decision about her pet; a family of pit bulls in an abandoned house is rescued.

Deep in the woods and bayous of Louisiana, wildlife agents protect the state's resources; a crab fisherman is caught stealing dozens of traps, a hunter crosses state lines with an illegal deer and agents rescue an injured bald eagle.

When an elderly man goes missing in a vast wilderness area, wildlife agents race to find him before nightfall; a tip leads agents to a haul of undersized redfish and anglers who refuse to confess; bloody evidence ties a trespasser to an illegal deer.

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.

Wildlife agents question a hunter with something to hide and notice damning evidence on his person; a group of youths shooting ducks from a moving boat is caught in the act; frightened hunters accuse a landowner of serial harassment.

A barrage of heavy gunfire in an archery-only area puts wildlife agents on high alert; two boaters are stranded on Catahoula Lake; a hunter is caught in an act of fraud; a veteran agent encounters a high-stakes violation on his final patrol.

When wildlife agents find an alligator with a fresh bullet wound to the head, nearby anglers are the prime suspects; an injured hunter must be evacuated by helicopter; agents use drones to track crabbers selling their catch across state lines.

LDWF biologists undertake an explosive mission to help conserve Louisiana's wild turkeys; a suspicious deer skull points to a hunter flouting the law; more than 1,000 lbs of shrimp are at stake when a captain is caught in a major violation.

Wildlife agents interrogate a felon caught hunting with a firearm; witnesses report a hunter trying to bludgeon a swimming deer from his boat; a duck shot out of season leads agents to a slew of violations.

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.

When wildlife agents find an alligator with a fresh bullet wound to the head, nearby anglers are the prime suspects; an injured hunter must be evacuated by helicopter; agents use drones to track crabbers selling their catch across state lines.

LDWF biologists undertake an explosive mission to help conserve Louisiana's wild turkeys; a suspicious deer skull points to a hunter flouting the law; more than 1,000 lbs of shrimp are at stake when a captain is caught in a major violation.

Wildlife agents interrogate a felon caught hunting with a firearm; witnesses report a hunter trying to bludgeon a swimming deer from his boat; a duck shot out of season leads agents to a slew of violations.

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.

When an elderly man goes missing in a vast wilderness area, wildlife agents race to find him before nightfall; a tip leads agents to a haul of undersized redfish and anglers who refuse to confess; bloody evidence ties a trespasser to an illegal deer.

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.

Amanda finds forever homes for her Hawaiian rescues; Super Scootie has malformed legs among other problems and Loco Moco struggles to process visual cues; a new rescue arrives named Lily Rose, a blind and overweight toy spaniel.

Amanda travels to California to pick up special needs dogs at a local SPCA; she comes home with a Rottweiler puppy with a severe eye injury, a husky shepherd mix covered in maggots and two small puppies whose ears have fallen off.

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.

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.

Bubby Cook, a beloved Basset Hound, has a condition that could complicate surgery for Dr. Ross; Dr. Blue has a hog house call; Dr. Lavigne has concerns over his vet tech assisting with an operation on her own dog; a blackout creates chaos at Cy-Fair.

After treating a yoga goat, Dr. Blue brings his best namaste to a herd house call; Dr. Lavigne has his hands full with a trained protection dog who's not a fan of him or the cameras; a party reveals if the Blues will be adding pink to their family.

Dr. Lavigne treats a French bulldog with a very vocal breathing problem that requires a special surgery, before joining Dr. Blue on a pet pig transport; Dr. Ross has an exam with Gurgi the guinea pig, who is coughing and sneezing.

Dr. Dee and her team must use a helicopter to rescue a wounded horse deep in the woods; Husky mix is hit by a semi truck; investigating a bearded dragon's long slumber.

Dr. Dee and her husband Ken host a clinic in a town with a population of 107; back at Animal House, Dr. Dee races to save an akita with a gunshot wound.

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 decide how to proceed with a 3-month-old micro-pig that needs leg surgery, when anesthesia could kill it; routine dental exam for French bulldog becomes complicated operation; the team helps couple who rescue sled dogs in the Rockies.

Dr. Jeff and his team help a homeless man's 5-month-old puppy that has a broken paw; x-rays reveal one of the worst cases of bladder stones in a dog the staff have ever seen.

Kidney disease plagues an overweight cat; dog gets hit by a car while the owners are overseas.

A golden retriever with a broken leg is rushed into the clinic by his devastated owner; Dr. Jeff and his team treat a beagle after a vicious dog attack.

Dr. Dee puts her mother on a plane to a remote vet clinic in Manley Hot Springs; Rottweiler could have bone cancer; bunny suffers with large abscess; St. Bernard puppies stop by for a visit.

Dr. Dee flies to a remote clinic in Healy; tumors found on dog getting spayed; Dr. Dee readies Nugget the Bull to breed; Dr. Terry is surprised while giving six kittens their shots.

Kidney disease plagues an overweight cat; dog gets hit by a car while the owners are overseas.

A golden retriever with a broken leg is rushed into the clinic by his devastated owner; Dr. Jeff and his team treat a beagle after a vicious dog attack.

Dr. Dee puts her mother on a plane to a remote vet clinic in Manley Hot Springs; Rottweiler could have bone cancer; bunny suffers with large abscess; St. Bernard puppies stop by for a visit.

Dr. Dee flies to a remote clinic in Healy; tumors found on dog getting spayed; Dr. Dee readies Nugget the Bull to breed; Dr. Terry is surprised while giving six kittens their shots.

Dr. Dee and her husband Ken host a clinic in a town with a population of 107; back at Animal House, Dr. Dee races to save an akita with a gunshot wound.

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.

Find out what your favorite K-9 contenders from over a decade of competition have been up to since their football fame.

Camera crews are embedded with Team Fluff and Team Ruff to get a behind-the-scenes look at what it takes to become a Puppy Bowl champion.

Dan the Ref returns with his pooch pal Sonic to celebrate the MVPs who played their hearts out at Dog Bowl; revisiting the dogs with great plays and fumbles, along with the people who gave these lovable canines a second chance with a forever home.

Revisiting the top dogs of Puppy Bowls from the past and reminiscing on previous years of the event; how these competitive canines are living their post-championship lives and which pup will win the title of Best in Show.

Dan the Ref hosts a retrospective.

This Valentine's Day, Dan the referee returns to share some lovable moments in Puppy Bowl history; celebrating the love of puppies; rediscovering big flirts, cute plays and penalties, and more.

"The Puppy Bowl" crew treks across the country to catch up with some of the game's ruffest and fluffiest competitors.

Puppy Bowl XXII starts with the Puppy Bowl Kickoff! The final puppy recruits from across the country will put their skills, sniffs, and cuteness to the test. See which pup is drafted into Team Ruff or Team Fluff before the biggest game of the year.

Over 120 rescue puppies from 72 shelters across the country join Teams Ruff and Fluff in the cutest competition in sports. Featuring special guests and an all-new Halftime Showdown, it's the loudest call to action to adopt, don't shop.

Over 120 rescue puppies from 72 shelters across the country join Teams Ruff and Fluff in the cutest competition in sports. Featuring special guests and an all-new Halftime Showdown, it's the loudest call to action to adopt, don't shop.

Over 120 rescue puppies from 72 shelters across the country join Teams Ruff and Fluff in the cutest competition in sports. Featuring special guests and an all-new Halftime Showdown, it's the loudest call to action to adopt, don't shop.

Puppy Bowl XXII starts with the Puppy Bowl Kickoff! The final puppy recruits from across the country will put their skills, sniffs, and cuteness to the test. See which pup is drafted into Team Ruff or Team Fluff before the biggest game of the year.

Over 120 rescue puppies from 72 shelters across the country join Teams Ruff and Fluff in the cutest competition in sports. Featuring special guests and an all-new Halftime Showdown, it's the loudest call to action to adopt, don't shop.

Puppy Bowl XXII starts with the Puppy Bowl Kickoff! The final puppy recruits from across the country will put their skills, sniffs, and cuteness to the test. See which pup is drafted into Team Ruff or Team Fluff before the biggest game of the year.

Find out what your favorite K-9 contenders from over a decade of competition have been up to since their football fame.

Camera crews are embedded with Team Fluff and Team Ruff to get a behind-the-scenes look at what it takes to become a Puppy Bowl champion.

A stray dog arrives at RAPS in rough shape and the team uncovers his surprising story; William, a street-wise cat, amazes Dr. Maldonado with his resilience; Odin, a German Eurasier, heads into surgery; Karen is handed a huge picking challenge.

A black cat with breathing problems gives the vets a run for their money; Bucky, a senior Labrador, takes a frightening turn during surgery; Lucy the Hedgehog surprises her owner with undetected health issues.

History is made at the Australia Zoo when Robert and team attempt the largest alligator capture and relocation; koala breeding takes a tough turn for Bindi and the Wildlife Hospital; Terri gives the Sumatran elephants more space to roam.

The boys look back at their fondest and most dangerous mishaps in Mississippi including the time they helped the Gulf Coast Gator Ranch capture over 200 gators or the first gator they caught named Petsy or the time...

As the calls keep coming in, everyone has been stretched thin since Jimmy quit; Paul comes to the begrudging realization that it's time to replace him.

Jackson works with a couple who have a lovable cat, Zachary, that also happens to spray all over the house; Jackson's conclusion as to why Zachary marks: barbarians at the gate; Jackson meets with troublemaking cat Freddie Krueger.

Jackson must rescue two cats from their cycle of co-dependency before they're kicked out of their owner's house; Jackson is introduced to a couple who shelters four special need felines and a man who struggles with his frisky feline.

Tia's goal is to transform the lives of parolees, however, one parolee risks his chances to get on the correct path; a pit bull rescued from the streets of Jackson, Miss., steals the heart of a potential adopter's heart.

Over 120 rescue puppies from 72 shelters across the country join Teams Ruff and Fluff in the cutest competition in sports. Featuring special guests and an all-new Halftime Showdown, it's the loudest call to action to adopt, don't shop.

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.

Jeremy fishes in the Alaskan wilderness and searches for a lake monster of native legend.

Jeremy Wade journeys up the Congo River in search of the goliath tiger fish.

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

Jeremy Wade travels to Japan, searching for two legendary monsters.

As spring approaches, the Kilchers prepare for a potentially devastating wildfire season; however, when COVID-19 threatens the homestead and crews are evacuated, the family must come together and adapt like never before.

An unprecedented new chapter kicks off on the homestead as the Kilchers film themselves coping with Alaska's stay-at-home order amid a growing pandemic; resources must be stretched, home-schooling proves difficult and Atz Lee's PTSD resurfaces.

As spring approaches, the Kilchers prepare for a potentially devastating wildfire season; however, when COVID-19 threatens the homestead and crews are evacuated, the family must come together and adapt like never before.

An unprecedented new chapter kicks off on the homestead as the Kilchers film themselves coping with Alaska's stay-at-home order amid a growing pandemic; resources must be stretched, home-schooling proves difficult and Atz Lee's PTSD resurfaces.

Jeremy fishes in the Alaskan wilderness and searches for a lake monster of native legend.

Jeremy Wade journeys up the Congo River in search of the goliath tiger fish.

Dino the dog's anxiety level has the owner sacrificing her own mental health treatments; another dog, Dexter, is becoming increasingly nippy and confused; the final push at Bin City needs to reap big rewards.

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.

Robert handles an aggressive wombat called Bunker, and it's moving day for a giant anaconda called Nikki. Terri helps treat hundreds of lorikeets injured by a hailstorm. Later, Robert and Chandler team up to bake a special treat for the Irwin ladies.

The Gator Boys are convinced now more than ever, after some sub-par volunteers and dangerous gators, that they really need to get Jimmy back; Ashley twists her ankle while trying to help Paul, turning a gator capture into a deadly situation.

With gator hunting season on the horizon, the Gator Boys race against time in Mississippi to find and rescue the gigantic gator known as Moby Dick, before the hunters catch a massive prize.

A young man with a genuine fear of cats; The Cat Daddy returns to Colorado to keep his favorite kitten from the kitten rescue road trip in her adoptive home; Jackson teaches a boy he met at the adoption event how to clicker train kittens.

Jackson experiences a severe, and most illuminating, cat attack at the claws of a troubled cat named May; the Cat Daddy must help a nervous cat guardian move her two very feral cats to Canada.

The time to celebrate Armando's wedding approaches, but even on this happy occasion the dogs come first; when a rescue mission becomes more than she bargained for, Tia must race to the altar, not wanting to miss Armando's big day.

Tia makes a difficult decision; a family seeks shelter for its pit bull after losing a home in a fire.

Officer Jim Cyrs and Lt. Saunders rush to the scene of an ATV accident; Officer James Benvenuti works with K-9 Cora to track down a suspect; Officer Eric Hannett gets backup from Lieutenant Bill Boudreau when dealing with a suspicious fisherman.

Murphy and Demler investigate a suspicious turkey kill while Courtney rescues a scared fawn near a busy road. Meanwhile, Lucas races to save a sick loon.

A hunter is too close to a school and damaging property; investigating reports of a bear being fed in a residential area; questioning a man about illegal owl parts.

Officers help state police investigate a missing persons case; a landowner needs help with a group of squatters; aiding an injured hawk.

A hunter and a witness disagree about the truth; a trespassing target shooter; fishing for the truth from trespassing ATV riders.

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 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.

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.

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.

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 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.

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.

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.

Murphy and Demler investigate a suspicious turkey kill while Courtney rescues a scared fawn near a busy road. Meanwhile, Lucas races to save a sick loon.

A hunter is too close to a school and damaging property; investigating reports of a bear being fed in a residential area; questioning a man about illegal owl parts.

A dog that goes to great lengths for food; a goose that will bite anyone; the dog with the guiltiest smile.

A dog that will eat the rug out from under you; a pet anteater; Lucky the dog escape artist.

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.

Paul is in search of a veterinarian who can perform a dangerous operation to fuse a gator's broken ribs back together while using a anesthetic that is life threatening to gators.

A woman who calls about a gator in her backyard, soon ends up volunteering for Gator Boys Alligator Rescue, but when Tre starts to teach her the ins and outs, the experience goes to his head and decides to open a gator wrestling class.

Jackson goes to New Jersey to help a single mom whose cat, Pickles, terrifies her kids; the Cat Daddy works with Lucifer, a cat whose devilish food obsession and constant pursuit to eat may cost him his life.

A vicious cat named Kleo terrorizes her home, keeping the owners from their wedding day; another couple is desperate for Jackson's help with their cat Marco who tortures their tiny dog Yuki.

Tia and Tania help out in the aftermath of a tornado; Mariah oversees her first solo puppy adoption.

Tia's dream of relocating becomes a nightmare as fate turns against her; a call from the former owner of one of Villalobos' most aggressive dogs leads to the ranch's most emotional reunion yet.

Pianoworks in Rochester, N.Y. wants Wayde and Brett to build them a piano of their own; this one is made out of acrylic and filled with fish.

Ethel M Chocolate Factory in Henderson, Nev., gears up for its annual Holiday Cactus Lighting event and tasks Wayde and Brett with building the ultimate holiday tank; Heather surprises Wayde with a gift.

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.

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

Alison prepares to release an endangered penguin. Emily anesthetizes a cheetah that needs to go to a new home. Will and Rachel at Care for the Wild introduce orphaned baby rhinos Ribbon and Lazuli, whose mums were killed for their horns.

Anna and the team dehorn two rare and dangerous black rhinos; Emma spends months rehabilitating Finya the Black-Backed Jackal for release, but getting her ready to move proves difficult; Jenna and Sean tackle human and elephant conflict.

Partially blind bull elephant Matambu is seriously injured; Harriet and the team are on a race against time to find him; Emily and Annie work with a herd of skittish roan antelope when one bolts and needs to be tracked down.

After historical wildfires rip through Australia, the Irwins race to rescue as many animals as possible; Robert and Terri jump in to help the severely injured koala population; Bindi and the wildlife hospital rescue hundreds of baby flying foxes.

Complications arise after the birth of Talbert the giraffe; Robert rescues a black swan entangled in fishing line; Bindi and Chandler plan for Kingston the rhino's first birthday.

Anna and the team dehorn two rare and dangerous black rhinos; Emma spends months rehabilitating Finya the Black-Backed Jackal for release, but getting her ready to move proves difficult; Jenna and Sean tackle human and elephant conflict.

Partially blind bull elephant Matambu is seriously injured; Harriet and the team are on a race against time to find him; Emily and Annie work with a herd of skittish roan antelope when one bolts and needs to be tracked down.

After historical wildfires rip through Australia, the Irwins race to rescue as many animals as possible; Robert and Terri jump in to help the severely injured koala population; Bindi and the wildlife hospital rescue hundreds of baby flying foxes.

Complications arise after the birth of Talbert the giraffe; Robert rescues a black swan entangled in fishing line; Bindi and Chandler plan for Kingston the rhino's first birthday.

Ethel M Chocolate Factory in Henderson, Nev., gears up for its annual Holiday Cactus Lighting event and tasks Wayde and Brett with building the ultimate holiday tank; Heather surprises Wayde with a gift.

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.

Dog keeps dropping while out on walks; pet skunk always gets what she wants; too much catnip for cat; dog gets into the toaster oven; dog breaks out of backyard repeatedly.

Dog's intelligence is in question; bulldog has "mine" complex; clepto-cat; dog raids kitchen and eats candy; squirrel befriends dog.

Chandler must handle a koala crisis, while Terri lends a hand to care for an influx of puggles; A turtle called Billy undergoes a critical surgery, and Bindi recruits Chandler and Robert to bake a special wombat birthday surprise.

Paul has his hands full juggling nuisance gator catches and training new volunteer Caroline; Jimmy, Tre and Scott try to save a gator that swallowed a flip-flop.

Jimmy leaves town with Ashley and Andy to do his road show, while Paul has only newbie Caroline to help with gator calls.

A ferocious black feline terrorizes her owner's with frequent surprise attacks that the local urgent care doctor knows them by name; a couple is desperate for Jackson's help to end their cat's litter box strike.

A man's devilish cat, Darkness has made his girlfriend fear for her safety after moving in together; a couple's four felines have turned their brand new home into a war zone.

Tragedy results when Tia and Mariah help a man care for two rescued animals; a Villalobos volunteer wants to adopt a dog with a strange past.

Tia and her rescue team land in a dangerous situation when an anonymous tip leads them toward a dog-fighting ring; one lucky pit bull awaits permission to enter a new home.

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.

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 teams up with a specialist in Newfoundland in search of a predator that was declared extinct in 1930; the duo meets with a hunter that shot what is believed to be a wolf and uncovers evidence that suggests the species could be alive.

Colorado park ranger Andy Peterson is hiking when he crosses paths with a mountain lion and its prey; in Vancouver, Kari Toft is walking her dog just steps from her home when she is attacked by a vicious raccoon.

While hiking in Alaska, Catherine Dwinnell encounters a 1,000-pound moose that strikes her from behind; in Hawaii, Tony Lee swims a half-mile from shore when something grabs him and drags him below the surface.

On a dream trip in Alaska, Greg Matthews and his brothers cross paths with a grizzly bear; in Australia, Ella Murphy and her friends go surfing when a mystery assailant violently strikes her in the head.

Outside Corpus Christi, Texas, Jeremy Sutcliffe is working in his garden when a rattlesnake bite puts him on the brink of death; while spearfishing in the Bahamas, Kent Bonde is blindsided by a bull shark that tears the calf muscle from his leg.

A black bear charges Joe Azzouggagh and his German shepherd, Ace, deep in the Ontario wilderness; single father Andrew Dickehage, forced to walk six miles along a rural road at night, comes under attack from unseen predators.

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.

On a dream trip in Alaska, Greg Matthews and his brothers cross paths with a grizzly bear; in Australia, Ella Murphy and her friends go surfing when a mystery assailant violently strikes her in the head.

Outside Corpus Christi, Texas, Jeremy Sutcliffe is working in his garden when a rattlesnake bite puts him on the brink of death; while spearfishing in the Bahamas, Kent Bonde is blindsided by a bull shark that tears the calf muscle from his leg.

A black bear charges Joe Azzouggagh and his German shepherd, Ace, deep in the Ontario wilderness; single father Andrew Dickehage, forced to walk six miles along a rural road at night, comes under attack from unseen predators.

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.

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 teams up with a specialist in Newfoundland in search of a predator that was declared extinct in 1930; the duo meets with a hunter that shot what is believed to be a wolf and uncovers evidence that suggests the species could be alive.

Amanda teams up again with Tia of "Pit Bulls and Parolees" to help Aiden, a Great Dane mix with a brain issue; she meets Chickpea, a French bulldog with a medical condition that quickly turns into a life or death situation.

Amanda works with Tia of Pit Bulls & Parolees to rescue a 3-legged Shepherd mix as part of a road trip rescue mission; she picks up 16 dogs along the way, including a young lab with a brain issue and a puppy mill survivor.

Bindi welcomes the arrival of tiny poison dart frogs to their new home at the zoo; Terri takes charge when the crew moves Bosco out of the Crocoseum; Chandler helps a glider called Kronk.

Ashley shares her challenges and preparations for wrestling a gator and demonstrates how her work differs from the men's with a women's empowerment group.

Bob Freer makes the announcement that he is closing Everglades Outpost due to lack of funds after Jimmy gets bit by a gator; no outpost means no gator rescue as Paul races to keep the outpost open.

Jackson meets bully cat, Baby, who's holding all the female cats hostage, causing them to hide in the bathroom; Jackson comes to the aid of an interior designer's couch destroying cats, one of which is shedding pounds on a hunger strike.

Jackson comes to the aid of three Boston families; Bengal threatens couple's first holiday; fighting cats may cancel party; sphinx pees all over gifts.

Tania and Tia rescue a sick dog from the streets; Chong's health deteriorates as his cancerous tumor continues to grow; Tia works on a long-distance adoption.

Kenani and Moe celebrate their birthday by converting a home in the swamps to a dog sanctuary; when one of Villalobos' beloved dogs gets unexpected news, Tia is determined to have him live out his days with the twins.

Pete builds a Scottish-inspired treetop cottage for Scottish gardeners in Tulsa, Okla., that connects to the clients' home by way of a sky bridge.

Pete uses hand-hewn rustic cedar to build an African-inspired circular hut treehouse complete with aerial walkway, spiral staircase and thatched roof.

Pete builds a butterfly-themed treehouse that includes six trees in Independence, Ohio, for a hope center that wanted a theraputic space within the trees.

A couple dreams of having a treehouse atop a lighthouse in Washington, and Pete finds the property's steep grade challenging.

Pete Nelson uproots an existing treehouse from the family-owned bed & breakfast Treehouse Point to build a custom-made treehouse as a housewarming gift for his daughter, Emily.

Pete and the crew round-up the magnificent seven of cypresses alongside the Frio River and moseys on down to Leakey, Texas to build a gigantic, Texas-sized treehouse with the longest bridge in NT&S history.

Pete builds a clubhouse for a camp for children battling cancer; a crow's nest outpost and peek-a-boo roof for full interaction with nature.

Pete finds inspiration in old tales to build a mesmerizing treehouse, with a curved turret that soars two stories high and a deck to take in the amazing sights, over the stems of a twisty silver maple on the shore of Lake Chelan.

A magical castle treehouse to inspire artistic endeavors; partying is the task for Pete and his crew in eastern Nebraska.

Pete and the crew round-up the magnificent seven of cypresses alongside the Frio River and moseys on down to Leakey, Texas to build a gigantic, Texas-sized treehouse with the longest bridge in NT&S history.

Pete builds a clubhouse for a camp for children battling cancer; a crow's nest outpost and peek-a-boo roof for full interaction with nature.

Pete finds inspiration in old tales to build a mesmerizing treehouse, with a curved turret that soars two stories high and a deck to take in the amazing sights, over the stems of a twisty silver maple on the shore of Lake Chelan.

A magical castle treehouse to inspire artistic endeavors; partying is the task for Pete and his crew in eastern Nebraska.

Pete uses hand-hewn rustic cedar to build an African-inspired circular hut treehouse complete with aerial walkway, spiral staircase and thatched roof.

Pete builds a butterfly-themed treehouse that includes six trees in Independence, Ohio, for a hope center that wanted a theraputic space within the trees.

Felines take over when Amanda helps an energetic kitten facing euthanasia after breaking his leg for a second time, along with a tiny kitten born with malformed front legs; a 3-legged Husky-Rottweiler pup needs a forever home.

A 150-foot long super snake known as the Yacumama attacks and kills people in Peru; the villagers fear it so much they try to blow up the creature with dynamite.

Investigating a bigfoot-like creature with superhuman strength reported in the foothills of the Andes; Mungo hears chilling yet conflicting stories on the Ucumar: some believe the creature is a bear, while others think it's more of a yeti.

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.

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 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.

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.

A Bernese Mountain Dog suspected of scarfing an unmentionable feast is a potential record-breaking challenge for Dr. G; a feline rushed to a clinic after a close encounter with a sewing kit sparks a race against the clock to save a family from loss.

A canine's strange appetite delivers a stomach full of surprises; a cat with hair-ific taste leads to a marathon recovery mission; Dr. G's son, Ben, joins him for an action-packed summer.

When a Golden Retriever's tastes go off the beaten track, Dr. G's skills must be rock-solid; Captain the three-legged cat's appetite proves to be as unique as his form; Dr. G's furry family brings a special inspiration to his work and life.

An apparent dog treat turns out to be anything but for Norman the canine; a cat with unexplained symptoms has Dr. G chasing a cause; a suspected foreign body case proves to be more than anyone bargained for.

An old dog develops new tastes that aren't exactly what they seem; when a feline devours a stringy oddity, vet staff are blind to its identity; Ben realizes Dr. G is nearing a major career milestone.

A former stray cat that's believed to have scarfed an unidentified snack means a jagged challenge; a magnetizing situation draws Dr. G in, putting his skill and expertise to the test; Ben hopes to see his dad hit a big career milestone before summer ends.

Animal House gets busy as Dr. Dee must deal with a Chihuahua with a life-threatening condition, trim the beak of a vocal Macaw, and treat a deathly ill newborn calf; Dr. Dee and Ken add seven fainting goats to the family at home.

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.

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. Jeff tries his best to suppress news that he has a serious medical issue as he performs complex surgery on an internally bleeding puppy; the team races to fix a young dog's badly broken leg after a car hits it.

Dr. Jeff pulls out all the stops to help two Chihuahuas found abandoned in a storm drain; a cat's bizarre eating habits threaten its life.

A kitten that has suffered head trauma needs immediate attention; Dr. Amy performs a risky surgery on a dog with a very weak heart; family's pit bull is hit by car; two wallabies exhaust Dr. Baier.

Doctor Jeff performs knee surgery on a dog; three sugar gliders have an attitude problem; the mobile clinic heads to South Dakota to help animals on a Native American reservation.

Dr. Dee hosts a pet tricks competition to raise funds for a no-kill animal shelter in Fairbanks; surgery for a pot-bellied pig named Lilly Lou is full of surprises; stallion of Dr. Dee's long-time friend has a possibly deadly tumor.

Nature wages war when Dr. Dee and Ken decide to rescue six baby owls after an eagle kills their parents; Dr. Dee's dog donates blood to a lab with auto-immune disease; cat receives stem cell therapy.

A kitten that has suffered head trauma needs immediate attention; Dr. Amy performs a risky surgery on a dog with a very weak heart; family's pit bull is hit by car; two wallabies exhaust Dr. Baier.

Doctor Jeff performs knee surgery on a dog; three sugar gliders have an attitude problem; the mobile clinic heads to South Dakota to help animals on a Native American reservation.

Dr. Dee hosts a pet tricks competition to raise funds for a no-kill animal shelter in Fairbanks; surgery for a pot-bellied pig named Lilly Lou is full of surprises; stallion of Dr. Dee's long-time friend has a possibly deadly tumor.

Nature wages war when Dr. Dee and Ken decide to rescue six baby owls after an eagle kills their parents; Dr. Dee's dog donates blood to a lab with auto-immune disease; cat receives stem cell therapy.

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.

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.

Sam Brittain and Melanie Croce run Seal Rescue Ireland, the only seal rescue in the entire country; alongside devoted volunteers, they do everything to save and rehabilitate orphaned and injured seals so that they can return to the wild.

After two years of devoted care by Julius, an orphaned baby elephant named Malkia is ready to return to the wild.

An unusual recreational vehicle in a high speed chase; combative speedsters; the scene of an ATV crash.

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.

Officer Joe Canfield investigates a home with multiple bear feeding complaints and finds more than he bargained for; Officer Egan investigates an abandoned car and missing persons case; officers respond to a drowning in the Connecticut River.

While searching for an injured eagle, an officer makes a surprising discovery; officers stumble upon a trespasser; the search for a missing swimmer.

Lt. Bill Boudreau investigates a complaint about a man illegally feeding bears; Officer Jon Demler pulls over a swerving car, only to find himself in the middle of a domestic dispute; the dive team searches for a man who may have drowned in Kingston.

Officer Chris McKee attempts to remove a bear from a tree in a playground; Officer Fluette picks out his new K-9 partner; Officer Lucas searches for a group of ATVs; on the snowy summit of Mount Washington, officers search for lost hikers.

Lt. Boudreau and Officer Hannett confront a hunter they suspect illegally shot a pheasant; Officer Egan receives a call from a Canadian hunter who shot a moose that crossed the border; a community unites in the search for a missing teenager.

A hunter who mistakenly takes down an antlered elk must face the consequences; a warden must come down hard on an ORV hunter who is skirting the law; a warden investigates a hunter on private property.

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

Wardens crack down on anglers not following the rules while salmon fishing; a hunter with a checkered past is caught red-handed; beaver dam management calls for some drastic measures; elk hunting season finds eager hunters on their best behavior.

A warden checks on a hunter he suspects may be illegally baiting deer. A warden tracks down hunters using blinds on state land and finds they aren't quite abiding by the law. Wardens enforce the law with anglers on the Detroit River.