Join Sir David Attenborough in the fifth programme in the series, as he sits beside wild lions in the darkness of the night and meets a Siberian tiger face to face. From the first tree-dwelling hunters through to the modern-day big cats, we follow the true story about cats and dogs to find out what you need to be a true carnivore.In the frozen north, the Arctic fox needs to hunt during warmer times and cache this food to survive the winter. In southern climates, leopards and tigers have become solitary hunters relying on stealth and surprise to catch their next meal, coming together only to mate. Others around the globe like wolves and lions work in teams and family groups so they can tackle larger prey and better protect their young. But their efficiency as hunters makes it essential that their family life is held together and tightly controlled. With all hunters, the aggression of the kill means the difference between life and death.