Many animals have unique features that help them climb, from the sticky pads on the bottoms of frogs' feet to the prehensile tail of the kinkajou. The Kratts lose a climbing contest to a band of coatis, whose sharp claws and long tails give them an advantage, while Jackie and the Animal Helpers rescue a kitten who has figured out how to climb up a tree—but not how to get back down to the ground.

Toothbrush, the baby elephant finds Martin and Chris Kratt, roaming about in a cave where bats live. Since Toothbrush has been separated from her family, the Kratt brothers aide her in searching for them. This way, she will be reunited with them again. A garder snake is spotted, when Jackie was cutting the grass. The snake likes being in dark areas, so she doesn't mow down, part of the grass.

When two fellow ring-tailed lemurs come to visit, Zoboo is stunned to hear that many people don't know what a lemur is. The Kratt brothers offer to remedy things by declaring an international Lemur Day holiday, complete with party and cake. Jackie rescues two turtles who were heading for a busy highway.

Animal Junction finds itself the center of attention for bears, wolverines, and kinkajous.

Animal Junction goes buggy, and Zoboo, Chris and Martin start to think that these tiny critters are nature's little superstars. Insects and spiders are amazing athletes: quick-leaping grasshoppers, far-flying butterflies, super-strong ants, heavily armored beetles and plenty more. Bugs have to be quick because lots of other creatures like to eat them. But if bugs disappeared, a lot of other creatures would disappear too. That's why the Kratts always say, 'Be nice to bugs.' Chris and Martin get a bug's eye perspective when they shrink down to insect size and find out that it's no picnic being an ant. Some kids stomp on ants, but Jackie's there to stop them, explaining how cool ants and their underground homes are, far too cool to stomp on.

There are giant animals galore at Animal Junction: giraffe, elephant, camel, and capybaras among them. This leads the Kratt brothers to find the world's biggest deer, biggest lemur, and biggest cat. Trees are also given giant attention.

Everybody likes horses, so the Kratts spend time with a foal and her mother, a strong Belgian draft horse. Then the brothers learn what's different about zebras.

A bath for certain animals is not what one would think. Chris and Martin give a bath to dogs before stepping out of Animal Junction for the elephant bath.

While the brothers are building a model of a dinosaur they call the ""Martinandchrisaurus,"" Zoboo tells them he thinks he saw a dinosaur on his way to Animal Junction. The mystery creature turns out to be a monitor lizard. Jackie breaks open a pellet from an owl's stomach to see its prey's bones and fur inside, then runs into the Kratts while visiting the Royal Ontario Museum to see dinosaur bones.

The arrival of a couple of river otters prompts a swimming party, with black jaguars, soft-shelled turtles, penguins, and capybaras jumping in. Jackie and her dog Goldie join in with a swim in MudPuppy Pond, where they meet even more water creatures.

It's all about animal coats, from porcupine to lynx to duck.

The Kratts help out a beaver who's looking for wood to build a dam, and Jackie and the Animal Helpers build nest boxes for Eastern bluebirds.

Chris, Martin, and Zoboo explore the good things about slime, from puppies showing affection by licking to the slick coatings that keep frogs from drying out and let earthworms slide through dirt. To help make MudPuppy Pond an even better home for her own favorite slimy buddies "mudpuppy salamanders", Jackie rakes dead leaves into the water.

When two African penguins stop by Animal Junction, Zoboo, Chris and Martin talk about water creatures. Even though penguins are birds, they swim instead of flying. But these penguins aren't swimming! Finally, they realize it's because the pool water is too warm for them. But when the water is chilled with ice cubes, there's no stopping the penguins! Jaguars love to swim, too, and the Kratts play ball in the big pond with a black jaguar who stops by. Jackie has a new goldfish named Sunny, who is also sensitive about water temperature. To keep from shocking Sunny, Jackie puts his bag into the aquarium until the water in the bag is the same temperature as the aquarium.

Martin and Chris follow the tracks of a lynx through the snow, and Jackie works on protecting her bird feeder from marauding squirrels.

After admiring the camouflaged coats and amazing night vision of two visiting black jaguar cubs, Martin and Chris build a pair of "Eye-Spy goggles", a contraption that lets them see the world as various animals do. Jackie replants the evergreen that was her Christmas tree and decorates it with apples and popcorn for the birds.

The guys have a plan to plant grass seeds to attract the African Crowned Crane to Animal Junction. But, they have a time trying to keep the sheep and goats from eating all the grass beforehand. These creatures have amazing lids like horns on top of their heads. DUCK! Jackie learns about lids, like antennas on different creatures. TO THE CLOSET! Chris and Martin go off to find some more amazing lids. They run into prong horned antelope and a moose. They both have horns and antlers to protect their heads when fighting. CREATURE QUESTION: Written by Anna Bourque Directed by Steve Wright

Spots and stripes are great camouflage for creatures, helping them blend into their environments. When Zoboo, Chris and Martin see striped and spotted creatures (tiger cub, serval cats, Dalmatian puppies, coati babies and a skunk), they're inspired to paint Animal Junction in spots and stripes. Zoboo takes that inspiration a step further when he paints spots on Martin and stripes on Chris while they're both asleep. Zoboo paints himself with spots and stripes, and the gang learns about being a camouflaged creature. Jackie says that milk weed plants may look like weeds but they're home for striped monarch caterpillars, so please don't pick them.

A flying squirrel glides in looking for a hole to live in, and a search around Animal Junction reveals lots of other animals, from foxes and rabbits to snakes and porcupines, already living in various holes. When a man starts to cut down a dead tree with a hole in it, Jackie stops him by explaining that it may be the home of an owl.

A camp-out at Animal Junction gives everyone a chance to discover nocturnal animals, creatures who sleep during the day and are active at night. Binturongs, raccoons, owls, ringtails, and dormice are among those living the night life.

Today, Animal Junction is full of baby creatures! A baby ring tailed lemur, lynx kittens, bobcat kittens, a sliver fox kit, and baby coatis all need to be taken care of. Chris and Martin build a creature playpen to keep them all in. DUCK! Jackie and her helpers find a baby bird that fell out of a tree. They make a nest and put the bird back for the mom to find him. TO THE CLOSET! The guys take a trip to see how different animal moms take care of their babies. CREATURE QUESTION: What creature is the biggest native North American land mammal and lives in big herds? Written by Anna Bourque Directed by Steve Wright

It's kitten pandemonium when all kinds of kittens turn Animal Junction upside down. An overwhelmed Zoboo, Martin and Chris try to take care of these curious creatures but quickly realize that they're in over their heads. Luckily, the cavalry rides to the rescue when the mother cats arrive to take control of the situation. The guys wonder if wild cats are similar to house cats and go to see if lions and cougars purr. Jackie is busy brushing her cat Rapunzel, a great way to show her cat that she cares for her. Plus, birds and squirrels love the loose fur for padding their nests.

"Fling" is the nickname the Kratts give to a white-fronted capuchin monkey, which they return to the wild. Jackie learns about the wild when she tries to build a terrarium for a frog.

Everyone has got an itch, whether it's from poison ivy, bugs, or burrs.

Rabbits, bloodhounds, springhares, and foxes weigh in as Chris and Martin want to hear every animal's range of hearing.