Secrets of the Zoo: North Carolina

Zoo keepers prepare for a chimp birth, vets investigate a bear's mystery illness and a dangerous antelope is darted on the zoo's grasslands habitat.

At the North Carolina Zoo a gorilla has emergency dental surgery, vets examine a deadly rattlesnake and zoo keepers try to take blood from a lion's tail.

Zookeepers prepare for the birth of a white rhino; two young lions leave the pride; and a pair of cannibalistic snakes go on some risky dates.

The zoo hopes for a polar-bear pregnancy; two endangered red wolves go on a blind date; and a young elephant gets some unusual treatment.

The zoo welcomes a timid, new giraffe to the herd; a pregnant bat prepares to give birth; and devoted keepers give an epileptic chimp a better life.

The doctors at the North Carolina Zoo are swamped! A huge alligator, with a history of illness, needs blood drawn, and a ferocious lioness goes under the knife to remove a cracked tooth.

Keepers hope for a long-awaited sand cat kitten; a nervous puffin chick learns to swim; and rescued black bear cubs prepare for life outside the zoo.

Zoo vets treat seven pythons; orphaned otter pups go to fish school; and keepers rush to help Arctic foxes with mysterious injuries.