The Parting of the Ways
Subsequently, in "Dalek" (2005), it is revealed that the last great Time War was fought between the Time Lords and the Daleks, ending in the obliteration of both sides and with only two apparent survivors; the Doctor and a lone Dalek that had somehow fallen through time and crashed on Earth. At the conclusion of that episode, that surviving Dalek self-destructs, leaving the Ninth Doctor believing that he was the sole survivor of the Time War. However, the Daleks return in "Bad Wolf"/"The Parting of the Ways" (2005), and subsequently in several other stories.