Narratively, Dalek was the first major look at the Last Great Time War's destructive scope, on both the Dalek species and the Doctor himself, and the severity of the guilt and rage in the Ninth Doctor that lingered onward after he personally ended the war by causing an intolerable amount of death. It was here that his feelings of disgust reached a boiling point and he found an ominous parallel with his most hated foe.