The Impending Threat Level Is Curiously High at 221B in Sherlock Series Four Teaser Trailer

In the new teaser trailer for the highly anticipated fourth series of Sherlock, the eponymous character senses a nefarious threat that will affect his professional life, his personal life and even where he lives.

Here's Benedict Cumberbatch's personal message for Sherlock fans at San Diego Comic Con.

Mark Gatiss and Steven Moffat deciding who amongst the staff got to go SDCC.