“Elementary” is very good, it’s in its fourth or fifth season. What bumped me about it initially is, Lucy Liu was cast as the female (de-frocked) Dr Joan Watson. The casting in the show is spot on. The mysteries are all new. Some episodes are way better than others (I’ve seen ‘em all). The CBS website streams the most recent five episodes of all their current shows (”The Big Bang Theory” for another example).
In brief, Sherlock is a recovering heroin addict, in NYC, works as a consultant with the NYPD, is very eccentric in his interests, basically a very entertaining show, Lucy Liu notwithstanding. I think she’s put pressure on to be a bit too much more than Holmes’ protege, and I find that PC and annoying.
Liu does bring back the ACD "serious" character.