Case of mistaken identity. A recent episode was dedicated to Leonard Shaffer, who was a coin expert who had made a few appearances on the series. Many viewers assumed that "The Old Man" (Richard Harrison) was the subject of the memorial. He is alive & well. (and grouchy)
Oh wait! That is not an emotion! Wait, Here it is!
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them