Moffat told Collider: “Mark [Gatiss] will be starting [to write] very soon. He may have started. I’ve got to finish my Doctor Who 크리스마스 special, and then I’ll be straight onto Sherlock after that.”
"There's this assumption about 팬 that they're nuts," he tells the new issue of Red magazine. "But they're people that are really passionate, and I like that.
During the 글쓰기 of "His Last Vow", Moffat also wrote a scene about what Sherlock and Irene did after he rescued her from the terrorists in Karachi. However, the scene was never meant to be filmed.