The Zoo: San Diego

An adorable baby hippo arrives and an orphaned koala needs support. Plus, a team travels to Kenya to share their innovative milk formula for elephant calves.

A pair of rescued mountain lion cubs are ready for their new habitat. Plus, a white rhino undergoes an intense procedure in the hope of saving the species!

Hyena brothers are moved into the lions' habitat. Plus, the staff are ecstatic when a zebra shows signs of pregnancy and Mabel the pygmy hippo welcomes a calf.

The staff develop an innovative course of treatment when a cheetah has an injury. Plus, the zoo hosts the only pair of platypuses outside Australia.

The Rhino Rescue Center welcomes Arthur, the southern white rhino calf. Meanwhile, a young nyala must be hand-raised before returning to its herd.

When lesser flamingo eggs and chicks are being preyed upon, the team must make a nerve-wracking decision. Plus, a wallaby and her joey become ambassador animals.

After taking over the former red river hog habitat, a gazelle gives the team a big surprise. Staff race to prepare a den when they suspect the Amur leopard is pregnant.

Staff hope for a mating match between the black rhino newcomers. Meanwhile, the meerkats are put on a new diet and a lizard needs support.

Staff feel the pressure as a century-old Galapagos tortoise undergoes surgery. And, an orphan koala bear gets a special birthday surprise.

A baby klipspringer is born on one of the coldest nights of the season and is miraculously nursed back to health. The California condor team at the Safari Park goes to unbelievable lengths to save this highly endangered species.

Hunter the koala is ready for a mate. Jaws the Galápagos tortoise isn't feeling well, and the zoo staff works to bring him out of his shell. The Safari Park has not one but two baby giraffe calves that need to be hand-reared simultaneously.

There will be no peace in the world for the hamadryas baboons until Impo finds his mate, but the San Diego Zoo keepers have a plan; two young cheetah cubs are training to become animal ambassadors with the help of their experienced canine guide.

Safari Park keepers prepare Aria the rambunctious black rhino for her new life on the open African Plains exhibit; zoo staff cares for 15-year-old legend M'bari the lion and his mate, Etosha; a vulture chick learns to eat from a surrogate puppet.

The Zoo says goodbye to beloved pandas Bai-Yun and Xiao Liwu as mother and cub prepare to return to China. Tembo the retired "Hollywood" elephant tries traditional Chinese medicine for her arthritis. The Butterfly Jungle gets colored for the season.

After six years away, Mek the tiger returns to the Zoo; two shy tree kangaroos, Spike and Polly, meet for the first time; with the Children's Zoo under construction, the keepers have to move over 100 animals, including a herd of reluctant goats.

Safari Park keepers say goodbye to two elephant brothers; a look at if the San Diego Zoo vets can design a custom shoe for Felix, an excitable three-toed Baird's Tapir; two African penguin chicks grow up and get ready to join the colony.

Mkhaya, the youngest baby elephant in the Safari Park herd, learns to use her trunk; Alba the Andean bear is a potential first-time mom; Zoo vets examine Mandazzi the gorilla; Jeff the snake chaser looks for the elusive costal patch nose snake.

Southern white rhino Victoria is pregnant with a calf that could be key in saving a species from extinction. Connor the Malayan tiger has tooth trouble. A new bird keeper learns to feed the shoebill. Polar bears exercise their hunting skills.