How the Sausage Is Made - S5-E8
Continuity mistake: When Sherlock puts down the meat sample in the cup, you see the toothpick tilt over to the side. In the next shot, the toothpick is straight up and down. In some shots, the meat sample in the cup are gone.
How the Sausage Is Made - S5-E8
Continuity mistake: The note Watson picks up changes when it switches to a close up view of the writing. For example, you can see one line ends with "you when" and another line ends with "not" (being underlined). In the close up the corresponding lines end with "you when I" and "not to" (not still being underlined).
Chosen answer: M broke into the brownstone and left a note. Holmes deduced he was staying at a high-class hotel from the soap scent on the note, and gave a picture from a hidden camera to his "irregulars" on the street to stake out hotels. One of them saw him, so Holmes followed him to his next intended victim and knocked him unconscious with a baton.
Sierra1 ★