The A.V. Club
First things first: Sherlock’s back, and while it might be only for 90 minutes, it’s a welcome return. It looks like this will be the only time we get to spend with Holmes and Watson (at least with this version of the pair) until 2017, since Benedict Cumberbatch and Martin Freeman are quite busy being movie stars. It would have been understandable, and even oddly sweet, had this special been what it seemed to be from its promotional materials: a romp into the past, removed from the show’s larger narrative, and a brief taste of something to hold audiences over until season four. Just a nice little New Years’ gift from Moffat and Gatiss, right?