Anyway, maybe I'm reading too much into this (or maybe its been referenced elsewhere) but I couldn't help but smile at Emma's little "elementary" quip when Steed explains the links that drew him to tracking down the bad guy - especially since the latter was played by Douglas Wilmer, whose stint as Sherlock Holmes had been broadcast earlier that same year by the BBC
![Smile :)](./images/smilies/icon_smile.gif)