Yuukoku no Moriarty

Synopsis

Holmes has a nightmare where he willingly kills Jefferson. He later admits to Watson that despite his fame thanks to the Drebber case, he prefers to solve a bigger mystery. While he is alone, Holmes wonders whether or not he should have accepted Jefferson's offer. He then fires a gun which draws Mrs. Hudson, Watson, and Lestrade's attention. When Lestrade mentions that the Viscount of Redshire died on a lakefront in York, Holmes, Watson, and Lestrade go there to investigate. Following the investigation, Holmes and Watson have an argument. In the dining car, Holmes spots William and Louis. When he approaches them, he claims that he has figured out that William is the mastermind behind the aristocrat murders. While Louis is worried that Holmes knows the truth, William calls Holmes' bluff, stating that he would have to prove it. Later, as Lestrade introduces himself to the Moriarty brothers, they are informed there is a dead body. After Holmes proposes a contest to William to see who can solve the case first, Watson shows up while covered in blood.

(Source: Wikipedia)