More from the series where broadcasters follow their personal passions by talking to the people whose stories interest them most. BBC newsreader Jane Hill's father and uncle both lived with Parkinson's disease, and in this series she talks to people from families with an inherited genetic disorder. In the second of two programmes she talks to John Jennings, who has a high chance of inheriting a rare form of early onset Alzheimer's disease. They discuss the emotional impact of having this disease in the family and his decision whether or not to get tested for the gene. Producer: Sally Heaven.