Documentary series uncovering the secret lives of big cats, using the latest technology and scientific research to bring these animal superstars out of the shadows.

Part 1:
In Ruaha, Tanzania, lions form huge super prides in order to hunt giants. Amongst cats lions are unusual, the only one to live in groups. In numbers they find the strength and audacity to hunt the most formidable prey.
In Sri Lanka a tiny rusty-spotted cat explores his forest home - 200 times smaller than a lion, the rusty-spotted is the smallest of all cats, but just as curious.
The Canada lynx lives further north than any cat, relying on snowshoe hares to survive the bitterly cold winters. Until now, lynx were creatures of mystery, but now technology provides an insight into their secret lives.

Part 2:
The secret lives of the world’s most mysterious cats are brought to light by advances in remote and low-light filming technology. In South Africa, we follow the nocturnal pursuits of the tiny black-footed cat that stakes its claim to the title of the world's deadliest, and in remotest Mongolia we reveal the rarely seen Pallas's cat, at home with her kittens - she hunts by looking like a rock. Finally, in South Africa, we uncover the secret of the serval that thrives amongst the futuristic landscape of Africa's biggest industrial complex. These are remarkable cats, with surprising lives in extraordinary places.

Part 3:
This new age of discovery is revealing there is still so much to learn about the cat family. Using high-tech collars, Professor Alan Wilson has discovered it is not straight-line speed that is a cheetah's greatest weapon but their ability to break, change direction and accelerate. His research is rewriting what we understand about the fastest animal on land. This is also a crucial time for cat conservation - most are threatened, facing extreme habitat loss and conflict with humans. Yet there are many positive stories of cats bouncing back from the brink,