Eleventh Doctor's regeneration
From Tardis Wiki, the free Doctor Who reference
This topic might have a better name.
Fall of the Eleventh as that’s the in universe title
Talk about it here.
The Eleventh Doctor, having expended the 12-regeneration life cycle beginning with the First Doctor, was enabled to undergo what he called "regeneration number thirteen" into the Twelfth Doctor after being provided with additional regeneration energy by the Time Lords. (TV: The Time of the Doctor)
However, in a timeline viewed by the Doctor at an earlier date, the Doctor was seen to have finally died, with their TARDIS growing its exterior dimensions and acting as his grave. (TV: The Name of the Doctor)
