In the TV Series Sherlock I know there are many references to the original canon (for example the hat). Particularly variations of the episode names. A Study in Pink - A Study in Scarlet A Scandal ...
At the end of "The Reichenbach Fall", Sherlock and Moriarty have a confrontation on the roof of the hospital. (I am not sure why Sherlock chose the roof in the first place, but that is neither here ...