Secrets of the Zoo: Down Under (2020) : 5x8

At Taronga, keeper Carolene observes cloudiness in hippo Nile’s eyes, leading to an urgent investigation. Due to hippos' size and danger, a large team of keepers, vets, and eye surgeons comes together to resolve the issue. Meanwhile, elder cotton-top tamarin Diego receives care as the primate team prepares him for an aged-animal assessment.