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In the last few days of his life, the Doctor pays a farewell visit to his old friend Craig, and encounters a mystery, as the time-travelling drama continues.

People are going missing, a silver rat scuttles in the shadows of a department store, and somewhere close by the Cybermen are waiting…

The Doctor is played by Matt Smith, Craig by James Corden, Amy by Karen Gillan and Rory by Arthur Darvill.