Since 2014, Sherlock fans have been waiting for the next batch of improbable, likely very dangerous mysteries for the Benedict Cumberbatch (Sherlock) and Martin Freeman (Watson) dream team to solve. While there are still a few months to go until the series returns with its darkest season, BBC One took to Twitter to drop a couple vague clues about the Baker Street boys’ upcoming adventures. The network revealed the names of the first two episodes of the three-episode season: “The Six Thatchers” and “The Lying Detective.” Like in previous seasons, the names seem to allude to titles from Arthur Conan Doyle’s original 56 Sherlock Holmes short stories. “The Six Thatchers” could be a reference to “The Six Napoleons,” a story involving a criminal destroying busts of Napoleon, while “The Lying Detective” is likely related to “The Dying Detective,” a story in which Sherlock did, indeed, lie by pretending he was about to die. The fourth season will air in America on PBS in January 2017. Watch the trailer below.