In the last scene of "The Blind Banker" where Sherlock and John are having breakfast, John looks out the window and sees a female street artist spray painting an eye onto a box.
I've been wondering what the significance of the eye is because all of the details of the show are really important.
Maybe it symbolizes Morirarty's omniscient presence? Maybe it is a symbol of Sherlock's perception and clarity? Maybe it's a threat? A warning?
What could the graffiti eye mean?
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If you're going to be boring, please do it over there.