The 2013 mini-episode "The Night of the Doctor" reveals that at first the Doctor (at this point the Eighth Doctor) refused to take part in the war, even as it spiralled out of control and threatened to destroy the universe, instead working to help where he could but refusing to fight. This led him to attempt to save a woman from a spaceship crashing towards the planet Karn, who refused his aid because he was a Time Lord (as she claimed she couldn't "tell the difference" between the two species any more, implying that the Time Lords were just as destructive as the Daleks). The Doctor was killed in the crash, but was restored to life temporarily by the Sisterhood of Karn, who finally convinced him that for the sake of the universe, he had to take a stand and fight. They further offered an elixir that would control his regeneration and allow him to take a form best suited for the task. The Doctor accepted, remarking that there was no need for a Doctor in a universe consumed by war and requested that the Sisterhood make him a "warrior". He drank the elixir and regenerated into the War Doctor, declaring himself "Doctor no more."