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".
Tosin Cole
Tosin Cole (born 23 July 1992) is a British actor. He is known for various roles in British television series and films. He began his on-screen career starring in "The Cut" and "", later securing a regular role as Neil Cooper in the soap opera "Hollyoaks". After leaving the show Cole appeared in a range of television series and commercial films for guest appearances and participated in many short films. In October 2017, the BBC announced that Cole had been cast as Ryan Sinclair in the 2018 series of "Doctor Who".