Documentary. Author Sir Terry Pratchett - an Alzheimer's sufferer - travels to the Dignitas Clinic in Switzerland and witnesses first-hand the procedures for assisted death.

In a frank and personal documentary, author Sir Terry Pratchett considers how he might choose to end his life. Diagnosed with Alzheimer's in 2008, Terry wants to know whether he might be able to end his life before his disease takes over.

Travelling to the Dignitas Clinic in Switzerland, Terry witnesses first hand the procedures set out for assisted death, and confronts the point at which he would have to take the lethal drug.