Leopard is one of a series of BBC Wildlife Specials. Each film is a masterpiece of expertise and innovation: award-winning cameramen using revolutionary filming techniques, backed by the latest scientific research, and each features one of nature's superstars, revealing aspects of its life that have never been seen before.The leopard is the least known of all Africa's big cats. Until now, the leopard, an animal of the night, has been virtually impossible to observe. Using state-of-the-art camera equipment, this film ventures into the night, and follows the lives of two leopards in Zambia's Luangwa Valley, to reveal the night-time secrets of the cat that walks on its own.