Character mistake: When they've worked out that the kidnappers were changing flood maps, Harlan says he "doesn't get why anyone would mess with flood maps in the first place." Looking at the maps it's blatantly obvious that the reworked flood zone excludes a chunk of land, and given property prices in New York it doesn't take a genius to figure it's at least connected to real estate, insurance, etc. Harlan is demonstrably a genius, and could certainly have figured that out for himself.
Elementary (2012)
1 mistake in The Geek Interpreter
Starring: Lucy Liu, Aidan Quinn, Jonny Lee Miller, Jon Michael Hill
Incel: Who are they?
Sherlock: That's Homeland Security.
Incel: But...you promised you wouldn't tell them about me if I talked to you!
Sherlock: Yes, but you play den mother to a pack of would-be rapists and mass shooters, so you can see how lying to you would be the highlight of my day. Look on the bright side - you don't seem to enjoy the company of women, and that shouldn't be a problem for the next five to ten years.
The Hound of the Cancer Cells - S2-E18
Trivia: "The Hound of the Cancer Cells" is a loose reference to "The Hound of the Baskervilles", perhaps the most famous of the four Sherlock Holmes novels.
More questions & answers from Elementary
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 ★