Since elderly actors are being discussed, I considered mentioning this one and then discovered that there's even a DS connection!
I was trying to determine an episode I saw last night and so wrote down the names of a couple of the guest stars to see if I could look it up. One was Charles Lane. There are a lot of Charles Lanes, but I checked out the first one and the picture immediately revealed that he was the one I wanted. It turned out he was born January 26, 1905 and died July 9, 2007, nearly 102 1/2!!! And, his last work was as a narrator, voice only, in a short called The Night Before Christmas in 2006!!!! The last before that was in 1995 when he would have been 90. I then saw that he was an Antique Dealer in the 6th episode of the 1991 DS series. It was probably the equivalent of the Abe Vigoda role! He was in all sorts of things, so I'm sure everyone would recognize him from something.