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Benedict Cumberbatch and the Sign of Four (or is it Three?)

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Published on Feb 4, 2014

Sherlock star Benedict Cumberbatch gets some help from his friend Count Von Count to solve a brain-bending challenge from Murray-arty. #Counterbatch. Thanks to our friends at MASTERPIECE (http://www.pbs.org/masterpiece) and Sesame Workshop (http://www.pbskids.org/sesame) for their help with this video.
See exclusive behind-the-scenes pictures on our Tumblr http://to.pbs.org/1lCAa2o
See exclusive behind-the-scenes pictures on our Instagram http://instagram.com/p/kDHg4cjETG/
If you like this video, check out our #TomNomNom treat with Tom Hiddleston and Cookie Montster: http://www.youtube.com/watch?v=b_ubVV...

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