The third season (or “series” for you U.K. folks) of Sherlock came to a close here in the U.S. this weekend with the delightfully twisty “His Last Vow.”  The episode showcased the best of what Sherlock has to offer: humor, surprises, a touch of darkness, and of course the excellent chemistry between Benedict Cumberbatch’s Sherlock and Martin Freeman’s Watson.  Though season three is now over, Cumberbatch recently made an appearance on the classic PBS series Sesame Street in a bit of a Sherlock tie-in.  The network has now released a snippet of that bit online, and it features Cumberbatch interacting with a couple of muppets who are convinced that the actor is Sherlock Holmes.  It’s a cute watch and fans of either Cumberbatch, Sherlock, Sesame Street, or all three should find it worthwhile.  Hit the jump to take a look.