The official site has released a synopsis for the Doctor Who 2012 Christmas Special, The Snowmen, read it below. The episode is due to air on BBC One and BBC America on Dec 25 – see the latest poster art HERE.
Christmas Eve 1892 and the falling snow is the stuff of
fairy-tales. When the fairy-tale becomes a nightmare and a chilling menace
threatens Earth, an unorthodox young governess, Clara, calls on the Doctor for
help. But the Doctor is in mourning, reclusive and determined not to engage in
the problems of the universe. As old friends return, will the Doctor really
abandon humankind or will he fight to save the world – and Christmas – from the
icy clutches of this mysterious menace.