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".
Richard Schiff
Richard Schiff (born May 27, 1955) is an American actor and comedian. He is best known for playing Toby Ziegler on "The West Wing", a role for which he received an Emmy Award. Schiff made his directorial debut with "The West Wing", directing an episode entitled "Talking Points". He is on the National Advisory Board of the Council for a Livable World. He currently has a recurring role on the HBO series "Ballers". Since September 2017, he has had a leading role in ABC's medical drama "The Good Doctor", as Dr. Glassman, president of a fictional teaching hospital in San Jose, California.