Season 1 and Season 2 are a wonderful, engaging and entertaining. Both actors did great in bringing a long loved character into the 21st century. It was fast, entertaining and captivating. Season1 and 2 deserve are highly recommended.

However, Seasons 3&4 are a descent into pseudo-intellectual tripe, without a straight story line, or who's done it plot. Somehow the writers have lost the path and continuously made fun of the Holmes character by dropping him into East Enders Hell and see how he handled that bunch of human baggage. I do hope, if there will be a season 5, the writers pull their heads out of their perspective "bottoms" and write something in honor of Sir Arthur Conan Doyle, not something in honor of their own pseudo-intellectual prowess...

Very sad that the BBC has allowed it to go this far...