In this third episode in the Granada series, Watson receives a request from an old "friend," who has found his career and his health doomed by a mystery that he can't comprehend. While he has left his office, a document of great importance has disappeared from his desk. This is one of those Holmes stories where someone in a position of trust has been victimized. Still, the circumstances make it impossible to see how the document got out of the office and into the hands of someone wishing to start a war or to exacerbate the politics of the time. The strength of the story has to do with the physical makeup of the building which is the scene of the crime. There are a series of possible answers, but they never seem to satisfy the requirements of discernment. Holmes strength in all these cases is that he doesn't buy into the obvious solutions, but rather assumes nothing. An interesting factor for the modern reader (or viewer, in this case), is the incredible emotion expended by the victims. Having read all the Holmes stories many times, I recall that there seemed to be something called "brain fever" that was sort of a catch-all malady for people like the victim of this crime. I think another thing that makes this enjoyable for the average viewer is that while this is a serious crime, we've all had that experience of being careless and paying a price of some sort. Brett is again an intriguing Holmes and this is a very enjoyable episode.