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".
Dreamland (Doctor Who)
Dreamland is the third animated "Doctor Who" serial (based on the British science fiction television live action series) to air on television, and the second to air after the revival of the live-action series in 2005. It stars David Tennant as the Tenth Doctor and aired in six parts (one 12-minute episode, followed by five 6-minute episodes) broadcast daily from 21 November 2009 on the BBC's Red Button service, the official "Doctor Who" website and the BBC iPlayer. It was broadcast in its entirety on BBC Two and BBC HD on 5 December 2009.