10. 'Gallifrey falls no more' - The Doctors save the day
While we initially thought that the War Doctor was a dark and somewhat evil incarnation, it turns out that he's just a man faced with a difficult decision. Luckily, the tenth and eleventh Doctors (along with all the other incarnations) helped him to save the day and not destroy Gallifrey. So the planet of the Time Lords is simply lost somewhere out the universe waiting to be re-discovered.