John's Not Mad is a QED documentary made by the BBC in 1989. It was ranked, in a British public poll, as one of the 50 Greatest Documentaries. The film shadows John Davidson, a 15-year-old from Galashiels in Scotland, who had severe Tourette syndrome. John's life was explored in terms of his family and the close-knit community around him, and how they all coped with a misunderstood condition.

Nineteen people with differing degrees of visual impairment – from mild nearsightedness to total blindness – discuss how they see themselves, how they see others and how they perceive the world. Unusual images, of burning trees or empty deserts, link the interviews, which vary from deep to funny to poetic.