 Four years later, on Thursday, September 29, 1988, he made his final TV appearance on a very similar program, WPIX-TV, Channel 11's day-long celebration and retrospective of its 40 years on the air, ""WPIX at 40"".Following this last appearance, Ray Heatherton began showing signs of Alzheimer's disease.His still retained his positions, held since the mid-1980s, on the Boards of Directors of The Long Island Lighting Company, known as LILCO, and The Garden City Hotel, but was no longer serving as of the early 1990s.