Thanks to his role as Marty McFly in the Back to the Future movie trilogy, Michael J. Fox will always have a place in cinematic history. But despite fame and success, the star has endured some serious hardship. Famously, Fox has Parkinson’s disease, and he’s grown to become a leading voice in the fight against the debilitating condition. But now, the Emmy winner has opened up about some dark and upsetting times.