Another nicely conceived entry. I sometimes wonder why the screenwriters feel that the plots of these stories aren't adequate. Still, this is pretty true to the original. A room has been rented by a mysterious person at three times the normal rent with the caveat that there is to be no intrusion of any kind. The resident or residents are acting in a very unsettling way. There have also been some significant events. A man has been accosted on the street and stabbed to death. The husband of the landlady of the boarding house is himself kidnapped and later thrown out of a carriage onto an out-of-the-way road. The landlady, a friend of Mrs. Hudson in this one, comes to Holmes so he can investigate. He assures her he will give it appropriate attention. She returns in a dither when her husband is attacked. Now the case becomes more interesting. Holmes seems to have a connection with a person working in a mafia-like underworld. He sends Watson to see this man which puts the man in grave danger. It is all sorted out but is a bit confusing. It has a sort of darkness hanging over it. Good acting, all in all. We get to see Holmes' involvement in the netherworld.