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.

Bestselling author Terry Pratchett has early onset Alzheimer's disease. And he wants Alzheimer's to be sorry that it ever caught him. In the second of this two-part series, Terry confronts his future living with the disease. He travels to America to witness first-hand how they are coping with the 'tsunami of Alzheimer's', and meets the unlikely doctor who stumbled across a controversial new treatment that he claims produces remarkable results in minutes.