Sherlock and Joan end up in Moriarty's crosshairs on the season finale of Elementary. "Heroine" is the 23rd episode of the show's first season.
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Elementary Season 1 Episode 22 Quotes

You named a bee after me?

Watson

[To Sherlock] You see people like puzzles, I see them as games. You're a game that I will always win.

Moriarty