Super Size. The brothers visit San Diego Zoo to meet some supersized species including the huge Komodo dragon, the majestic Andean condor and the awe-inspiring polar bears. [S]
Saving Species. The brothers are at San Diego Zoo Safari Park to learn about saving endangered species. They come face to face with rhinos, giraffes and the California condor. [S]
New Habitats. The One Zoo Three zoo celebrates the opening of some amazing new animal habitats with a new den for the sun bears - but will the jaguars feature pad be a bit hit or miss? [S]
Strong Swimmers. The brothers celebrate some of the zoo's strongest swimmers. Can Cam tempt the jaguars into their new pool? And who will win the tapir food raft challenge? [S]
Indian Celebrations. There's a festival vibe at the zoo with the arrival of two new Asiatic lions. Meanwhile, cute red panda cub Tashi gets a check-up. [S]
Hottest Day. On an extremely hot day at the zoo, the white-cheeked gibbons enjoy a puzzling picnic, Spike the bearded dragon visits the vet, and there is a warm welcome set for Kyra the sun bear. [S]
Great Shape. Cam weighs Womba the palm-sized possum, Aaron teaches the camel brothers some manners, and Tyler gets Griffin the caracal to take a giant leap. [S]
Family Legacies. Cam helps Amur leopard Luka look for love, Tyler reunites with Khumbu the snow leopard, and Aaron sees the rare black hornbill chick fly the nest. [S]
Animal Superstars. Find out if supersized anaconda Optimus Prime welcomes his new housemate. Tyler tries to outjump a springy serval cat, and Amur leopard Xizi has a big operation. [S]
Veggie Day. The brothers are delivering healthy greens to all the animals. Tyler's puzzle gives the lemurs food for thought - and who will win the bug hotel build challenge? [S]
Sensational Smiles. Tyler makes gummy treats for the pygmy marmosets, Cam takes Baikal the white tiger to the dentist, and Aaron attempts to stop the camels chewing their home. [S]
Reduce Recycle. The brothers check up on how green they have been. A tiger gets stuck into an old barrel, and a ring-tailed lemur has a special, sparkly snack. [S]
Euro Zoo. The brothers go to work at an awesome German zoo. Tyler discovers the wonders of the rainforest, Aaron goes ape with orangutans, and Cam makes a splash at an elephant pool party! [S]
Super Mums. The brothers celebrate Mother's Day. It's a big step for snow leopard cub Shen, jaguar Kiera has a break from daughter Inka, and is Tilly the red panda having a baby? [S]
Fright Fest. It's a Halloween spooktacular at the zoo as the animals receive some eerie delights. There are creepy pumpkins for the lions, but will the meerkats brave their haunted house? [S]
Tiger Time. The brothers celebrate Chinese New Year with the big cats. Can some tasty Chinese lanterns help Luka the Amur leopard break the ice with his neighbour Xizi? [S]
The Birthday. It's a day of new arrivals as one of the pygmy marmosets gives birth and the penguins lay eggs. It's also Tilly the red panda's birthday. [S]
Alpha Animals. The brothers check out who the alpha animals are at the zoo. What will the lions make of the brothers' homemade zebras? And how will Jet the lanner falcon's new tail feathers fare? [S]
Dinosaur Day. The brothers check out their resident dinosaur descendants! Will the black hornbills' new love hut work its magic? And will penguin chick Marli brave her first dip? [S]
Zoo Legends. The brothers celebrate some of the zoo's legends and hold a special birthday party for their oldest animal, Newt the gibbon. And Cam builds some new ramps for arthritic meerkat Freya. [S]
Training Day. Everyone at the zoo is put through their paces on a special training day. Aaron heads off to collect Nina the super-long anaconda, and Tyler tries to outsmart Tierra the caracara. [S]
Perfect Partners. It's Valentine's Day at the zoo, and the brothers prepare some tasty romantic treats for the animals - but will Cam find out who his secret admirer is? [S]
Brush Up. It's health check day as the brothers make sure the big cats have luscious coats, sharp claws and sparkling clean teeth, while Inka the jaguar cub dives into a big pile of leaves. [S]
Cat Moves. The brothers help prepare for the arrival of Luka, a rare Amur leopard. Aaron gives snow leopard cub Shen a health check - and will Kadera the jaguar rise to her challenge? [S]
Superheroes. Cam, Tyler and Aaron want to hold a superhero-themed party inspired by the superpowers of the zoo's most incredible animals, including their camel's super-slurping suction. [S]
Welcome Party. The brothers hold a party to welcome a red panda, two cheetah brothers and some sand lizards to the zoo - but will Cam be able to collect the wriggly lizards? [S]
Squeaky Clean. While the brothers are making sure all the habitats are squeaky clean, they discover how much they can learn from the animals themselves, as they are nature's best clean-up crew. [S]
Big Steps. Trying to solve the case of the mystery footprints, the brothers look at the animals' feet. Could it be the penguin chicks, the snow leopard cubs, or something far more peculiar? [S]
Perfect Dens. The brothers learn all about different types of cosy animal dens. Bird expert Nadeem helps Cam build a bird box, and Aaron reveals why the Asiatic lion is most endangered. [S]
Power Players. Meet the zoo's powerful animals as Sonika the Asiatic lioness gets a grip in a tug-of-war and Tyler takes on Marion the sulcata tortoise in a contest of strength. [S]
Go Slow. The brothers learn about animals that like to take things slowly. They discover the top speed of a giant African land snail and see just how slow a sleepy sloth can get. [S]
Cool Creatures. The brothers visit Belgium's Pairi Daiza Zoo to meet pandas, walruses, penguins and the golden takin, all animals that have adapted to survive in the coldest climates. [S]
The Birthday. It's a day of new arrivals as one of the pygmy marmosets gives birth and the penguins lay eggs. It's also Tilly the red panda's birthday. [S]
Squeaky Clean. While the brothers are making sure all the habitats are squeaky clean, they discover how much they can learn from the animals themselves, as they are nature's best clean-up crew. [S]
Big Steps. Trying to solve the case of the mystery footprints, the brothers look at the animals' feet. Could it be the penguin chicks, the snow leopard cubs, or something far more peculiar? [S]
Shy Guys. The One Zoo Three brothers meet the zoo's shyest animals as Cam is challenged to a game of spot the reptile, and Tyler tries to tempt Rambutan the binturong onto his new platform. [S]
Perfect Dens. The brothers learn all about different types of cosy animal dens. Bird expert Nadeem helps Cam build a bird box, and Aaron reveals why the Asiatic lion is most endangered. [S]
Power Players. Meet the zoo's powerful animals as Sonika the Asiatic lioness gets a grip in a tug-of-war and Tyler takes on Marion the sulcata tortoise in a contest of strength. [S]
Eco-Heroes. Looking to help protect the planet, Cam, Tyler and Aaron take inspiration from the zoo's animal eco-heroes, including pygmy marmosets, Amur tigers and orangutans. [S]
Go Slow. The brothers learn about animals that like to take things slowly. They discover the top speed of a giant African land snail and see just how slow a sleepy sloth can get. [S]
Cool Creatures. The brothers visit Belgium's Pairi Daiza Zoo to meet pandas, walruses, penguins and the golden takin, all animals that have adapted to survive in the coldest climates. [S]
Roommates. The zoo brothers take inspiration from animals that live together. Can they help the sun bears to share? And how will Kasanga the African lion get along with his new partner? [S]
Young Ones. The brothers meet the zoo's youngest animals as Cam helps give two snow leopard cubs a health check. And it's goodbye to Tashi the red panda as he begins a new adventure. [S]
Strong Swimmers. The brothers celebrate some of the zoo's strongest swimmers. Can Cam tempt the jaguars into their new pool? And who will win the tapir food raft challenge? [S]