 Because the time streams are out of sync, the Doctor does not retain the memory of this until his eleventh incarnation.Indeed, earlier on in the episode, both the Tenth and the Eleventh Doctors mistakenly believe that the War Doctor killed all of the Time Lords on the last day of the Time War.While the plan is being outlined, the War Doctor notes that to the rest of the universe, it only appears as if the Time Lords and Daleks had mutually destroyed each other, when in fact, the Daleks had fired upon themselves in the crossfire after Gallifrey vanished, ending in the destruction of most of their own race, but not the Time Lords.<ref></ref> In "Death in Heaven" (2014), the Master, now regenerated into a female form called "Missy",<ref></ref><ref></ref> explains that when the Doctor saved Gallifrey, this caused the Doctor to save her as well.