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".
David Atkins (actor)
David Atkins is an English actor best known for his role as Rob Edwards in the British television soap opera "Hollyoaks", who he played from 2011 to 2012. Atkins also appeared in two episodes of "Doctor Who" in 2010. In 2016 he was cast in the semi-regular role of Tyler Green, a young police constable, in the BBC daytime soap, "Doctors", which he played until February 2017.