it's also where fox met his future wife, actress tracy pollan. >> is that a compliment? >> the couple has been married for 22 years, and they have four children. fox's tv success propelled him to movie stardom with the blockbuster trilogy back to the future. >> marty, you made it. >> yeah. >> fox followed his role as marty mcfly with more than 20 films. >> that's a nice pig you got there. >> that's what they tell me. >> but it was on the set of the movie doc hollywood, where fox first displayed symptoms of early parkinson's disease, which eventually pushed him into a new role, that of advocate. >> the war against parkinson's is a winnable war, and i have resolved to play a role in that victory. >> fox works tirelessly in his quest for a cure for parkinson's, fighting for funding, campaigning for politicians sympathetic to his cause. his support for stem cell research and the quest for a parkinson's cure has at times sparked controversy. despite using his celebrity to point the spotlight in a different direction, fox hasn't left hollywood behind completely, with numerous