Oliver Sacks's musings on the particularities and resilience of human beings in his books The Man Who Mistook His Wife for a Hat, An Anthropologist on Mars, and others, are beloved for both the warmth and depth of his insights. Chris Rawlence's series, The Mind Traveller, of which we present two episodes, follows Sacks in his inquiries into neurological and genetic phenomena, combining observation, interviews, and Sacks's asides to the camera. In Don't Be Shy, Mr. Sacks we meet a young girl and a woman with Williams' Syndrome, a condition which predisposes one to sociability and a heightened appreciation of music, but also to difficulty with numbers and an impaired spatial perception. The Ragin' Cajun focuses on a community of people with Usher's Syndrome who are born deaf and slowly go blind. Sacks travels to the Cajun area of Louisiana where there is a concentration of this syndrome, learns of their particular adaptions of signing, and ponders the possibilities of touch as language.-Kathy Geritz