Doctor Who
Thirteen actors have headlined the series as the Doctor. The transition from one actor to another is written into the plot of the show with the concept of regeneration into a new incarnation, a plot device in which a Time Lord "transforms" into a new body when the current one is too badly harmed to heal normally. Each actor's portrayal is unique, but all represent stages in the life of the same character. Together, they form a single lifetime with a single narrative. The time-travelling feature of the plot means that different incarnations of the Doctor occasionally meet. The Doctor is currently portrayed by Jodie Whittaker, who took on the role after Peter Capaldi's exit in the 2017 Christmas special "Twice Upon a Time".
Frazer Hines
Frazer Hines (born 22 September 1944) is an English actor best known for his roles as Jamie McCrimmon in "Doctor Who" and Joe Sugden in "Emmerdale". Hines appeared in 117 episodes of the original series of "Doctor Who"; only the first four Doctors appeared in more episodes.