Premise: The Doctor (Doctor Who) . The transition to each succeeding actor is explained within the show 's narrative through the plot device of `` regeneration '' , a biological function of his race that allows their change of cellular structure and appearance with recovery following a potentially fatal injury . The incumbent Doctor is the Twelfth Doctor , played by Peter Capaldi , who succeeded Matt Smith in the role in the 2013 Christmas special `` The Time of the Doctor '' after he was granted a new `` cycle '' of regenerations by the Time Lords . The Twelfth Doctor is an incarnation of the Doctor , the protagonist of the BBC science fiction television programme Doctor Who .
Hypothesis: The Doctor has the gift of regeneration.
Label: ENTAILMENT