I'm saddened to hear of his passing; I was thinking about him just last week, and wondering how he was faring, given that his Alzheimer's revelation had been five or six years ago. He was memorable in many, many roles, but the performance that will always stick with ME was his portrayal of astronaut George Taylor in "Planet of the Apes". I remember seeing that film for the first time on a Friday night in September of 1973 (or '74) on CBS, and being enthralled by it. Truly a master of his craft; he will be missed.