Here's the first teaser for Sherlock season four

Sherlock's next season is supposed to be just about done filming, which means that now — the day of Sherlock's Comic-Con panel — is the perfect moment for a first look. The BBC put out a dark and tense initial teaser today that shows Benedict Cumberbatch back in action as Sherlock Holmes and plays up the mystery around Moriarty's potential survival. It's not much, but it's the first time we've seen Sherlock back in the world of Sherlock in over two years, since his las