In the Christmas special "The Doctor, the Widow and the Wardrobe" (2011), the Doctor has Christmas dinner with Amy and Rory, who had been informed by River of his survival. They unite again in the Series 7 premiere "Asylum of the Daleks" (2012), in which the Doctor is erased from the Daleks' memory banks due to the actions of Oswin Oswald (Jenna Coleman), a young woman turned Dalek who had retained her human mind; she subsequently dies. The Doctor then takes Amy and Rory on several adventures, eventually taking them back on as full-time companions in "The Power of Three" before losing them during the events of "The Angels Take Manhattan". The Doctor subsequently "retires" to a secluded lifestyle in Victorian London, until the 2012 Christmas special "The Snowmen," when he is inspired to save the world by a barmaid/governess called Clara (Coleman) who he considers an ideal companion. Mid-adventure, Clara dies, and when the Doctor sees her tombstone, reading "Clara Oswin Oswald", he realises that Oswin and Clara are the same woman in different moments of time. He resolves to find her again in another era. The Doctor succeeds in "The Bells of Saint John", saving a present-day version of Clara Oswald from agents of the Great Intelligence. He takes her as his companion and attempts to solve the mystery of "the Impossible Girl". The Doctor eventually gets his answer in "The Name of the Doctor" when he is forced by the Great Intelligence to go to Trenzalore, revealed to be planet on which the Doctor will die. Within the Doctor's tomb, the Great Intelligence uses the dead Doctor's remnants—his disembodied "timestream"—to spread himself across the Doctor's history, turning his victories into defeats. Clara pursues him and is scattered throughout the Doctor's timeline creating Oswin Oswald and Clara Oswin Oswald among numerous other incarnations who undo the Great Intelligence's work. The Doctor has a mournful conversation with River's apparition, giving her closure before entering the timeline to retrieve Clara. However, once he saves her, the Doctor is forced to reveal the existence of a previous incarnation (John Hurt) who broke the promise represented by the name "Doctor" during the Time War of his past.