Jakub Vagner is searching for a natural born killer. His target is the mighty goliath tigerfish and he's heading up one of the world's most dangerous rivers to catch it.

A family ask for Antonio to design the ultimate pig paradise. Mr Pickles needs a new house, mud pit and plenty of space to run around in the garden.

In Calhoun County, Ben and Chelsea Bailey are out patrolling shrimp boats when one makes a run for it. Meanwhile, another warden makes some new furry friends.

With hope of redeeming themselves after their disastrous first hauling job, the four eldest Brown brothers prepare for a second solo mission.

Matt, Bam, Bear and Gabe feel the strain of making deliveries in harsh conditions. Plus, circumstances force a decision that will change the lives of the wolfpack.

Jeff is pleased with Bob and Screech learning how to feed themselves. He teaches them how to den up for the winter. Plus, the grizzlies get territorial.

Love is in the air at Australia Zoo! Terri helps determine if Caballe the Rhino is pregnant, while Robert matchmakes the zoo's Aldabra giant tortoises.

The Central Park Zoo welcomes its first Atlantic puffin chick. Meanwhile, an endangered species of gecko welcomes her first hatchling and Penny the rhino undergoes tests.

The Raneys return to Alaska, but they find their homestead on complete disrepair. They race to build a steel tram before the deep freeze sets in again.

When a beloved dog needs knee surgery, Dr Jeff may be his only hope. Then Dr Nichols and Dr Petra team up to fix a cat's broken elbow.

Basketball legend, Dwight Howard, needs the guys at ATM to design and build a habitat for all 14 of his snakes. And he wants a reptile mansion!

Investigator AJ swoops to save the pups of a dog that has given birth in an alley. Elsewhere, an animal medical technician pleads for the life of an injured bird.

An x-ray provides crucial evidence in an investigation into a case of three starving dogs. Investigator AJ confronts the owner with what her animals have been eating.

Across Texas, boating patrols are interrupted by record storms and flooding. Search and Rescue teams save multiple people from dangerous swift water.

A family who dedicate their time rescuing animals in Australia, release Crickey the koala back into the wild after a year of nursing him back to health.

Antonio meets a family with two bearded dragons stuck in a tank in a bedroom. He builds a backyard dragon clubhouse with a cool hangout spot for the family.

The team rush to rescue a dog found on a busy highway. Plus, a family travel from Massachusetts to find a four-legged friend to add to their household.

Peggy is a 'Real Housewife of Orange County'. Being a housewife, she's used to catfights, except she's now dealing with one involving her real cat.

Love is in the air at Australia Zoo! Terri helps determine if Caballe the Rhino is pregnant, while Robert matchmakes the zoo's Aldabra giant tortoises.

Dr. Jeff and his team helps two Chihuahuas found abandoned in a storm drain. Then Dr. Jeff makes a discovery when a cat's odd eating habits put its life in danger.

An environmentally conscious family, living in a designated bird sanctuary in Florida, ask design expert Lucas to create a human pool paradise and a bird pond oasis.

The team believes they've finally narrowed down where Bigfoot has been hiding throughout their expedition. A high-tech drone is brought in to investigate.

Billy's dream of self-sustainability is tested as the Browns start their biggest project yet, while Matt and Bam help Browntown's expansion with their own venture.

The Texas Game Wardens investigate a Jet-Ski accident that sends a man to the hospital. On Lake Lewisville, Wardens deal with a partier who's had too much to drink.

Biologist and predator specialist Dave Salmoni journeys to a mountainous island in the North East Pacific, which is home to a large number of grizzly bears.

Forrest combs the Florida Everglades for the black panther, which has never been seen in the US. Discoveries in the area suggest it may be more than a rumour.

A mission becomes personal when Miami's animal cruelty investigators find two adopted dogs wandering the city streets in need of help.