Truly a tragedy. If the name Gerry Anderson doesn't sound familiar, maybe some of the shows he created do: Thunderbirds and Space: 1999. There are other shows, but those are probably the two most prominent. I only ever saw bits of Thunderbirds and never saw an episode of Space: 1999, but Anderson was a major figure in science fiction and I know a lot of older geeks and nerds grew up watching his shows.
My hat's off to him. Alzheimer's is a terrible disease that no one should ever have to deal with.