Documentary about the Ngorongoro Crater in Tanzania, which has the highest concentration of predators anywhere in the world. A huge natural bowl inhabited by over 25,000 wildebeest, it is nonetheless a difficult environment for predators, and numbers are declining

Multi-millionaire landowner Paul Lister wants to turn his 23,000 acre estate north of Inverness into Europe's first wilderness reserve. Reinstating the old Caledonian pine forests is the first of his plans. He then wants to release long lost animals, starting with moose and wild boar, and eventually predators such as brown bears, lynx and wolves. Some of the local people are far from convinced by Paul's vision. Will he even be allowed to let loose moose in the glen?

At the jungle animal hospital in Guatemala, the wards are full of exotic patients, many of them orphans rescued from the illegal pet trade. It is the job of a dedicated team of vets to nurse them back to health.

We follow the team in their busiest year yet as they patch up animals in need, select a troop of spider monkeys for release and prepare a flock of very precious scarlet macaws for freedom.