Ben Fogle and Kate Humble are back for another sunny summer series, following the lives of the exotic animals at Longleat Safari Park and the keepers who look after their every need.

The keepers are nervously waiting for a new arrival - a capybara, the largest rodent in the world. He's in a lovely new home, and after a month's mandatory quarantine, he's allowed out into his very spacious enclosure. But this isn't without risk. The keepers must ensure that every inch of the fence line is secure, because they want the capybara to explore his enclosure - not the rest of the Longleat estate. Our cameras capture his release, but within seconds the keepers' fears are realised, and he disappears from view. Do they have an escaped animal?

Yesterday we showed the incredible story of the birth of Europe's first southern koala joey, and today we continue to follow its journey. It's now six months old, and keepers are nervously doing everything they can to ensure its survival. We find out why baby koalas eat their mum's poo, and when they take their first steps to independence. But there's one big question - is this joey a boy or a girl? To answer this involves its first vet visit - and its first separation from its mum. Will the keepers be able to safely lift it from Violet without causing either too much stress?

Elsewhere in the park, Ben and Kate have been following the journey of Willow the aardvark since she was born at Christmas in 2020. Her mum couldn't feed her, so she was hand-reared for five months, and since then she has grown to be bigger than the rest of her family. Ben helps with one of her regular check-ups, crucial to ensure her continued health.

The team are constantly trying to imitate their animals' natural environment and creating fresh ways to keep the animals engaged. Megan McCubbin helps the keepers stimulate the meerkats' senses with a variety of smells. Will they prefer lavender, eucalyptus or fruit tea? Or the box they arrived in? Hamza Yassin uses his powerful macro lens to help keepers identify whether any of the newly hatched lorikeet eggs have hatched.

Ben Fogle and Kate Humble are back for another sun-filled summer series, following the extraordinary lives of the exotic animals at Longleat Safari Park and the keepers who look after their every need. Today, we find out how the keepers' continued vigilance and dedication to the animals' welfare can alert them when something seems to be wrong.

There's another milestone for Hazel, the first southern koala born in Europe. She has to be separated from her mother for a short period. This is to ensure that the keepers earn the baby's trust before she becomes impossible to work with. Without this, the park wouldn't be able to perform their routine and important health checks. But can the keepers separate Hazel from her mum for ten minutes without distressing either of them?

Also, one of the keepers has noticed that the park's monitor lizard has a worrying issue with his spine. A specialist osteopath, who takes care of zoo animals that suffer from muscle or joint problems, is brought in to investigate. If he can't treat the lizard, the keepers will have to resort to giving him medication, a dangerous job for those who look after him. The osteopath decides to use laser therapy on the lizard, but will it work?

Elsewhere in the park, it's not just the animal keepers who are kept on their toes. The housekeepers of Longleat have their hands full hunting for carpet beetles that munch away on natural fibres like wool and silk. Kate heads inside to help in one of the house's 135 rooms. Ben celebrates a white-fronted brown lemur's 28th birthday, but what type of cake does a lemur enjoy?

Megan McCubbin finds out how the keepers train the nervous bongos to accept medical procedures like medicine and blood tests. Hamza Yassin has been given a task by the head of animal operations: to record the number of different wild birds he can spot in the park in just an hour. It's a useful barometer of the diversity of native species in the park.