Doctor.who.the.time.of.the.doctor.2013.1080p.bl...

Having used all twelve of his natural regenerations (including the War Doctor and a semi-regeneration as the Tenth), the Doctor faces actual death due to old age.

: The Doctor spends centuries defending the small town of Christmas from a coalition of his deadliest enemies—including the Daleks, Cybermen, and Weeping Angels—to prevent a renewed Time War. Legacy and Aging Doctor.Who.The.Time.of.the.Doctor.2013.1080p.Bl...

The episode resolves long-standing narrative arcs from the Eleventh Doctor's era, including the mystery of the "Silence," the cracks in time, and the eventual fate of Gallifrey. By centering the story on the town of Christmas on Trenzalore, showrunner Steven Moffat shifts the focus from an "epic" universal conflict to an intimate, centuries-long stand. The Doctor, usually a wanderer, becomes a stationary guardian, aging significantly as he protects a single "unimportant" planet for hundreds of years. Themes of Mortality and Renewal Having used all twelve of his natural regenerations