Rejoice, Sherlockians! Filming for Sherlock season 3, episode 3, His Last Vow starts today!
Filming should be taking place at the Cardiff based on this tweet from Mark Gatiss:
And just an hour ago, Arwel has also tweeted from the set of 221B!
Excited, aren't we?! Now, we just have to sit back and see if pictures start turning up from fans on location... xD