At a local sanitarium, an old man dies unexpectedly from an apparent heart attack. The man's grandson (Ed Begley Jr.) requests an autopsy and Quincy determines that the death was NOT from a heart attack but he can't find an exact cause. A bit later, a young lady from the same sanitarium dies and it's called a heart attack as well--but Quincy sees this as way too coincidental but again he can't find a cause. Astin pushes Quincy to give up and stop making irresponsible allegations (which he had been doing). But, when a third death soon occurs, it's obvious to anyone that this is NOT a series of coincidences. But how are people dying and who is doing it?!
This episode was among the best of the second season. Part of it is that several 'angels of death' (such as Donald Harvey) have been caught killing patients in the places where they work. Part of it is because it's very intelligently written and interesting. In other words, Quincy comes off as a reasonable person--not a social worker/cop rolled up into one. His worries about the rash of unexplained deaths were reasonable and made for a very tight story. I also liked the final attempted murder--it was, in a very dark way, kind of funny. All in all, well worth your time.