Kate Humble and Ben Fogle return to Longleat Safari Park to join the keepers and animals as the park springs into action for another season. The keepers get a shock when three highly endangered cheetah cubs are born, the first in the park's history. There is also a catch-up with Anne, the rescued circus elephant, and the animal osteopath who is helping to manage her arthritis. Meanwhile, on Penguin Island, a killer disease strikes and hand-reared birds begin to die in the arms of the people who raised them. Can a cure be found before it is too late?

Some of the world's most endangered species are at risk when a potentially fatal disease makes it on to the estate. Keepers in the giraffe house are on tenterhooks as they wait to see if a newborn calf survives the critical first few days. And it looks a bit like a bear and a bit like a cat but smells of popcorn - will an exotic new arrival be the key to a breeding programme that could save a species?

Keepers are locked in a battle of wills with Dave the Canadian timber wolf, who keeps attempting to explore areas outside of his enclosure. Having worked at the park for 40 years, one keeper might have finally got the two grumpy hippos just where he wants them. Meanwhile, Jean discovers just how powerful an elephant sneeze really is. And as the sun sets on the lion paddock, keepers are rigging special cameras to try to discover what goes on after dark.

A specialist wildlife cameraman from the BBC's Planet Earth series arrives at the park to film Longleat's most impressive feeders. His subject is a chameleon who has a tongue which flies out four times faster than a jet fighter. But what if it doesn't want breakfast? Meanwhile, Kate Humble and Ben Fogle discover the lengths keepers go to for the animal orphans, while Jean Johansson sets up a tug of war for the lion pride. Elsewhere, the stakes couldn't be higher as vital testing for a killer disease continues. But when tragedy strikes, can the keepers recover from the unthinkable?

Kate Humble and Ben Fogle round-up the Easter specials, including the continuing story of the two endangered cheetah cubs, Poppy and Winston. Having survived the first few months, it is time for them to go out into their big open enclosure. It is next door to the lions and will soon be full of visitor's cars, but who is more nervous, their mum Wilma or the keepers? Jean Johansson meets a highly endangered secretary bird and a troop of incredibly cheeky monkeys, and a fruit bat is rushed to the vet with a suspected broken wing. To do the x-ray it must have an anaesthetic, but will the tiny bat come back round?