Board Thread:The Panopticon/@comment-1711089-20140322010838/@comment-25566332-20140608011928

I think it may be a similar situation to what happened with Charley in the audios. She was originally supposed to die aboard the R101 but the Doctor saved her. This caused damage to the Web of Time but when Charley helped save the Web of Time, that resolved the paradox. Maybe the Twelfth Doctor helping to save Gallifrey meant that the Time Lords had no choice but to grant a new regeneration cycle.