I'm exasperated by these writers. Watson had a character development moment and even a task set her by Holmes and... nothing happened.. we saw her go places and talk but it meant absolutely nothing to the story and she ended the episode with nothing to show for any of it and when tasked with some investigation.. she did nothing and made no conclusions and waited for Holmes to give them to her.
Sherlock himself got to run around and tell the police their job while they stood shocked at his amazing jumps of logic... a victim with a needle in his arm it's staged! The show is so insulting they have the victim in a chair with the needle in his arm with his thumb still on the plunger. An open tub of salad on the counter (the only thing out of place in the sparse apartment)... police! you better test . well DUH!
So after a display of not-at-all-clever deductions (lets not forget that Holmes has been in this apartment for the previous hour while waiting for the police to arrive) the plot shifts to a multi-murder mystery that's so stupid you have to have never read or seen a crime plot ever before.
Lets put it simply you don't murder your way to the top of anything but being the obvious benefactor of those murders and more so lets not forget that the police tend to investigate deaths and those patterns tend to point at you and those around you. The fact that Sherlock is the only person to think beyond the obvious is just plain insulting to everyone including the poor viewer.
On the positive side.. the show looks nice... and is competently acted and shot. Oh no wait... after me praising Quinn's character for acting like a policeman last week he starts putting his bare hands all over crime scenes while Holmes goes out of his way not to int he same damn scene.