Touch is expressive, intuitive and complex in design and function. No sense defines us more. In this episode, take a journey through the skin, into the subcutaneous world of our sensory receptors and into the brain, to explore the hidden language of our most essential sense. Along the way meet Ian Waterman, a man who's developed some amazing strategies to compensate for the loss of his sense of touch. And discover what a race car driver and a surgeon have in common when it comes to using this extraordinary sense.

Chapters include: 1) Introduction 2) Losing touch 3) Informing action 4) Touch and perception 5) Haptic interface.