Two adorable tiger cubs have outgrown their keepers and need to move to the adult exhibit. A silverback gorilla receives pioneering treatment to curb his worsening eyesight. And a passionate keeper plays matchmaker to a peculiar pair of birds.

The Zoo's huge male sea lion is in rut, and staff need to move the young males before he becomes territorial. The vet team come up with an ingenious solution to repair Dinky the Flamingo's broken ankle. And feeding a rock python proves challenging.

A tomistoma, a freshwater crocodilian, stops laying eggs and a team of keepers scrambles to treat her. The veterinary team has to rescue a baby antelope that isn't getting the care it needs from its mother. And Mert the Goose takes a field trip.

The future of the American Bison depends on a high-stakes race across the country. The reptile staff have their hands full with a diamond rattlesnake that needs to be medicated orally. And a pair of cheetahs are trained to walk the grounds.

The birth of a little blue penguin causes a sensation at the Bronx Zoo. The veterinary team scrambles to figure out what is wrong with Snowball, a beloved snow leopard. And the exhibits team designs a home for the newly arrived blue iguana.

A snow leopard named Leo that was rescued from Pakistan has trouble eating because of a broken tooth; the bird department works fast to restore a beehive; a fennec fox gets extra attention from the Ambassador Center staff.

To help love bloom between two kiwis, zoo staff build an elaborate hut into which they introduce a pair of potential mates. When a King Cobra arrives at the zoo, keepers have their hands full training him to move from the exhibit to a holding pen.

A journey to eastern Africa is undertaken to return thousands of toads to the wild that were rescued from extinction. Also: A giraffe tries out a new piece of equipment; the avian department works to save the lives of millions of birds.