This groundbreaking scientific study uses GPS trackers and mini-cameras to follow 100 cats in three very different environments to find out what they get up to when they leave the house. The opening episode will look at how cats see, hear and smell the world with the senses developed by their wild ancestors, and looks at why this could be making life difficult for them in the modern world. Cat lovers will go mad for this, but it's interesting really whether you're a a friend of the felines or not.