File:Hashtag. What's a hashtag? - -SaveTheDay -- Doctor Who -- BBC

The Doctor likes a hashtag. Conversations across the Universe all held together by tiny little pins of chattery topics. Show your support for the Doctor by adding the hashtag #SaveTheDay to a Twitter, Facebook or Instagram post to build the new digital TARDIS and help to unlock sneak peeks from the 50th Anniversary episode, The Day of the Doctor.

Check out the digital TARDIS at http://www.doctorwhosavetheday.com/

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