there was marriage to third wife susan schneider, and his broadway acting debut in "bengal tiger at thehdad zoo" with williams playing the tiger who narrates the play. >> it's alarming, this life after death. the fact is tigers are atheists. all of us unabashed. >> then just last year, his career came full circle. when he returned to the small screen with former "mork & mindy" co-star pam dawber in the cbs sitcom "the crazy ones." >> you look like an alien! >> but off screen, williams was struggling with depression. >> he had at least three reasons to have severe depression. he clearly had the genetic basis for it. he had addiction. and addiction, and a recent relapse after a long period of sobriety. and he had cardiac surgery. people need to keep in mind when you have your chest cut open, the biology is such that it affects the brain and causes severe depression sometimes. >> there was also something else williams was dealing with, parkinson's disease, a neurological disorder that affects movement. williams was in the early stages of the disease. >> the diagnosis of parkinson's disease