Sherlock series 4 will arrive on the BBC in the UK and PBS in the US sometime in 2017.
The BBC has used San Diego’s Comic-Con to release the first trailer for Sherlock series 4, which teases the return of Moriarty and introduces Toby Jones’ new villain.
Holmes is seen in both fist and gun fights in the one-and-a-half-minute teaser, and looks uncharacteristically shaken at one point.
The teaser follows the first image from the new episodes that was released earlier in the month.