Matt Smith
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Matt Smith talks about the new series of Doctor Who

4 April 2011 Last updated at 19:59 BST

The new series of Doctor Who begins on 23 April with The Impossible Astronaut, a story that sees The Doctor and his companions facing a terrifying new threat.

The BBC's entertainment correspondent Lizo Mzimba has been speaking to the show's stars Matt Smith and Karen Gillan.