Talking to friend Carter today and wondering when series 3 will start filming. Articles online say the beginning of this year, so probably right now. Series 2 aired in the UK in September and IMDB has series 3 starting on September 1st. Count on having series 3 air on PBS this time next year. I know, I know, you have to wait if you're like me and watch it on the TV and not beforehand on the interwebs. Consolation? Sherlock starts May 6th and Masterpiece still has the new Great Expectations with Gillian Anderson, The Mystery of Edwin Drood, and Birdsong (whatever that is).