Nakuru National Park in Kenya is rather like a reform centre for wayward youth. Take Scarface: as a young lioness with a reputation for killing sheep and cattle, she was due to be shot. Instead, she was chosen to establish a new pride in Nakuru. Wildlife film-maker Barbara Tyack chronicles the life of this special lion family with a weakness for climbing trees. Fabulous camerawork captures great chase sequences, some gory ones, and the odd romance

• Documentary