Holmes and Watson look extra pensive in 'Sherlock' season 4 image - CNET

Actors Benedict Cumberbatch and Martin Freeman appear to be in a brooding mood in the latest image released for the upcoming season.

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http://www.cnet.com/news/sherlock-season-4-image-shows-an-extra-pensive-holmes-and-watson/#ftag=CAD590a51e