National Geographic WILD HD Saturday

Teleshopping. U.

The team takes on the challenge to build one of the largest tanks in America, which will house a living coral reef

Penguin mates prepare to become surrogate parents, a treasured white rhino trains for her next adventure, and a moray eel visits the vet

The zookeepers celebrate the unexpected birth of a baby siamang, a pony grows a concerning mass, and a painted dog combats seasonal allergies

The vet performs emergency surgery on a dog who's swallowed a rope toy, while Dr Nicole examines a tiny kitten with a big eye problem

Michelle visits a bear sanctuary and gets caught up in a conflict between two animals. She also examines a horse that has problems with its gait

Dr Michelle Oakley searches for a wild boar that is contributing to the overpopulation of the species. A nervous caribou panics while being transported to a new home

The secrets of how tigers function and live in their secret corridors, sending signals to each other that only another member of this species can understand

Tow rescuer Frank races to help a truck driver who has slid off the road while transporting nine cars

Bjorn gets into difficulty when he heads out to a job during a storm, and a truck causes big problems for Marius in the North

The team face their biggest challenge yet - a global snake crisis. As temperatures rise, thousands of snakes are on the hunt for food and shelter

In the height of black mamba season, the team splits up to deal with all the calls; Sioux and Mbali face a feisty black mamba while Simon wrestles an enormous specimen solo

A pack of wild dogs chooses a replacement for the dead leader, as the hyena clan expands its ranks and a lion pride is driven to the fringes of its territory

Charles upgrades the computer system at the clinic, but training is cut short due to an emergency call for a sick baby horse

The fair's in town and Dr Pol is busier than ever making sure his clients have healthy cows, sheep and pigs to show

The matriarch of a clan nears the end of her life, with the question of who will assume leadership in her place still unanswered

Simon and Siouxsie have to break up two mating boomslang snakes before they are attacked by a mob throwing stones at them

Journey deep within the Arctic backcountry, as the changing seasons bring new risks to the next generation of Alaskans

While temperatures rise and predators wake, Alaskans must stay on high alert in order to survive

The entire zoo is on watch as an elephant goes into labour - which could take as long as 30 days. A dentist performs a root canal on a polar bear, and bats receive a medical exam

An orphaned manatee is ready to be released into the wild, a polar bear is the zoo's newest resident, and an oryx antelope needs emergency hoof treatment

Dr Michelle Oakley has a tough day at the clinic. Plus, when a string of house visits get scary, two people end up in hospital

A chance to buy goods from the comfort of home