Episode 6

Kate Humble and Ben Fogle celebrate 25 years together on Animal Park, looking back at some of the animals, keepers and unforgettable moments they have shared, while new stories continue to unfold across the park.

After years of planning, it's a landmark day as four hippos take their first steps beyond their new home and into Half Mile Pond. The keepers have spent months preparing for this moment, but once the hippos venture into the water, there's no telling what they'll do next, or whether they'll come back when called.

As part of the anniversary celebrations, Ben and Kate revisit the story of Kadu, one of the park's most loved Amur tigers. When a routine procedure uncovered devastating news, her keepers faced one of the hardest decisions of their careers in a story that remains one of the most emotional moments in Animal Park's history.

Elsewhere, the Farmyard celebrates the arrival of adorable pygmy goat kids, while Megan McCubbin meets a critically endangered cotton-top tamarin who has recently given birth to a precious new baby, giving hope for the future of the species.