Sherlock writer Mark Gatiss has revealed more details on Series 2.

At the Kapow! Comic Con, Gatiss confirmed the three novels that the new episodes would be based on: “We knew after having a successful first run that the natural order would be to do three of the most famous [stories],” explained Gatiss to the audience, “being a version of A Scandal in Bohemia, a version of The Hound of the Baskervilles and a version of The Final Problem.”

The Hound of the Baskervilles saw the detective duo investigating the mystery of a phantom hound. In A Scandal in Bohemia, Sherlock found his intellectual equal, the beautiful Irene Adler. While in The Final Problem, Sherlock fought his arch-nemesis Professor Moriarty in one ‘final’ battle.

“There’s the question of how to go out on a cliffhanger and then the thematic things of the three stories, where we were trying to get to,” he said, “and what Sherlock and John’s relationship is a little further on. You can’t just go back to: ‘You have no emotions.’ ‘I don’t care.’ You’ve got to move on somewhere and make sure the other characters have something of a journey too.”

Gatiss also announced the writing line-up: “Steven [Moffat] wanted to do the twisted love story [A Scandal in Bohemia], I’m doing the Gothic horror [Baskervilles] and Steve Thompson is doing The Final Problem.”