Finally, presenting Jenna-Louise Coleman (for more than one episode)... When the fairytale becomes a nightmare and a chilling menace threatens Earth during the Christmas of 1892, an unorthodox young governess, Clara, calls on the Doctor for help. But he is still 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? Expect an appearance from Richard E Grant and Tom Ward (Silent Witness).