Masterpiece Mystery!

Sherlock: The Blind Banker (3x20)

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Watson is scrambling to do the errands and find a job while Sherlock Holmes (Benedict Cumberbatch, The Last Enemy) sits around, apparently in deep contemplation. Sherlock seems oblivious, and in no hurry to take a case. When there's been a break-in at a bank, Sherlock inexplicably springs into action. Nothing has been stolen, only indecipherable graffiti painted on a wall.