The first trailer for the fourth season of Sherlock has arrived.
Debuting at San Diego Comic-Con, the clip continues where the third season finale left off, teasing the return of Moriaty. We also get a fair amount of Toby Jones, who is rumoured to be playing Culverton Smith.
Benedict Cumberbatch and Martin Freeman return as Sherlock and John Watson, respectively.
Sherlock season four will premiere in 2017.