第 1 集: Mycroft 指派 Moriarty 去找回並殺死 Irene Adler，同時 Holmes 調查 King Wilhelm 的案件。

Mycroft visits Holmes and warns him to beware of women. Holmes then reveals to Watson that Mycroft runs the British government. Mycroft summons Albert Moriarty, who despite his links to William, is still a lieutenant colonel. He orders him to retrieve secret papers from Irene Adler, a former actress with links to nobility and the criminal underworld. He also orders him to kill her. William is interested Adler stole such documents, but has made no blackmail demands. Holmes and Watson meet their latest client, King Wilhelm of Bohemia. Adler possesses a photograph of his infidelity and is threatening to send it to his fiancé, so he offers Holmes £1000 to retrieve it. As the king leaves, he is revealed to be Adler in disguise. Sherlock tricks his way into Adler's home but Adler, who knew Holmes was coming, hides the photograph and burns down her home, announcing she will now be living with Holmes. William is impressed that Adler has publicly linked herself to Holmes. Holmes is surprised when Adler, a supposed ruthless criminal, puts herself at risk to save a young girl from noble bullies. Adler later discovers someone managed to place a letter inside her jacket. (Source: Wikipedia)

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