Celebrity·Posted on Sep 18, 2012What Is A Cumberbatch?Apparently some people haven't heard of the hugely popular star of BBC's Sherlock reboot, Benedict Cumberbatch. Obviously the people interviewed aren't on tumblr.by Cates HoldernessBuzzFeed StaffLinkFacebookPinterestTwitterMail View this video on YouTube youtube.com / Via laughterkey.tumblr.com