I found a Rugrats episode called Grandpa's Bad Bug and in the episode Grandpa Pickles fakes being sick and the Rugrats think that Tommy's grandfather has an insect inside of him and try to cure Grandpa Pickles of his "illness". I noticed that at the end of the episode the end credits say "In memory of David Doyle" so was this the final Rugrats episode that featured David Doyle as the voice of Grandpa Pickles before David Doyle died in 1997? I know that the late Joe Alaskey replaced David Doyle in the Grandpa Pickles in the rest of the Rugrats episodes