The upcoming Frontline report on Parkinson's airs next Tuesday Feb 3 on PBS (check local listings).
And beginning tomorrow, January 29, the entire film will be available to preview on the Frontline website:
http://www.pbs.org/wgbh/pages/frontline/parkinsons/
Frontline is particularly interested in having people participate in an ongoing electronic conversation about this topic on the Frontline website, including a live chat that will take place after the broadcast.