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.

After meeting a flying fox fruit bat, Zoboo wants to fly, too, so the Kratt Brothers build him a pair of wings. Zoboo flies to India with Martin and Chris right behind. On the way, they meet vultures and learn some lessons about flight.

Zoboo spies a larva and wonders what kind of legs this animal will have once it grows. Will it have strong legs like a tiger, hundreds of legs like a millipede or long ones like a kangaroo? When the larva finally transforms into a salamander, its legs are like nothing Zoboo imagined they would be!

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.

Zoboo realizes that plants and trees are as alive as all the creatures he meets in Animal Junction. The Kratt Brothers teach the lemur that plants grow well if they get good soil, lots of sunlight and enough water. And there are plenty of creatures willing to help plants flourish, including Toothbrush the elephant, Popcorn the binturong and a whole family of sloths. When Martin and Chris follow Popcorn to India, they visit a 2,000-year old fortress, where green creatures like vines and plants are taking over the site.

The pond in Animal Junction has dried up and two lion cubs and all the animals who live there are thirsty! As water is essential to the animal world, Zoboo does the Malagasy rain dance and the rain finally starts. The Kratt Brothers take a trip to Africa to check out some amazing water creatures.

The Kratt Brothers are taking care of a human baby named Xavier and a baby red kangaroo named Bigfoot, and Zoboo wants to help the two babies grow. Martin and Chris show Zoboomafoo that all creatures grow, but to do so they need food, sleep and exercise.

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.

It's treasure hunt time in Animal Junction for the Kratt Brothers, Zoboo and all of their creature neighbors. With the help of two fox kits, Zoboo locates the first piece of the puzzle leading them to the treasure but will they find the treasure itself?

Brainiac, the chimp, and Lost and Found, the Labrador retriever would love to do something fun together. Zoboo first advises playing ball with Lost and Found, but Brainiac is bored because she doesn't like to play. Next Zoboo suggests climbing and swinging all over Animal Junction but this idea makes Lost and Found sad. At last Zoboo comes up with a game they can both play-Wrestle & Chase! Martin and Chris go on a special trip and fall into a river, where they discover an elephant who is delighted to have a bunch of children give him a bath. Animals have feelings, just like people-they just have different ways of showing them.

It's time to clean out the closet but the more Zoboo tries to help, the bigger the mess he makes! No sooner is everything back in its place, than some European wild boars and a capuchin monkey mess everything up again. Zoboo has lots of fun learning how messy and clean means different things to different animals.

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.

When a snow leopard and Toothbrush the elephant come to Animal Junction, Zoboo is afraid that he will never be a powerhouse like these two creatures until he realizes every creature is a powerhouse in its own way - and discovers his very own power.

Martin and Chris are best buddies and Zoboo wants a special friend he can depend on as well. He meets a sea anenome and a clown fish, some sloths, langur monkeys and chital deer. At last, he finds his own best buddy Shark, the chameleon.

Zoboo invites a wolverine to live with him in Animal Junction, only to realize that there's not enough space for his new pal. Wild creatures need room to roam.

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.

Two Siberian tiger cubs arrive in Animal Junction and pounce and pop on every ball in sight as they practice their hunting skills. An effort to make an indestructible superball sends Zoboo and the Kratt Brothers to a place where tigers live-India.

A Gila monster and a snow leopard make Animal Junction a hot and cold place.