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"With filming underway for Doctor Who's 50th special, DS caught up with Matt Smith and writer Steven Moffat."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/doctor-who/news/a468147/doctor-who-star-john-barrowman-i-will-not-be-involved-in-the-50th/>