 The update maintains some traditional elements of the stories, such as the Baker Street address and Holmes's adversary Moriarty. Although the events of the books are transferred to the present day, some elements are incorporated into the story. For example, Martin Freeman's Watson has returned from military service in Afghanistan. While discussing the fact that the original Watson was invalided home after serving in the Second Anglo-Afghan War (1878 – 80), Gatiss realised that "[i] t is the same war now, I thought. The same unwinnable war."
