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".
Doctor Who: The Tenth Doctor Adventures
The Tenth Doctor Adventures, announced in October 2015, is a Big Finish Productions audio play series based on the television series "Doctor Who". It sees the return of David Tennant as the Tenth Doctor and Catherine Tate as Donna Noble. The first trilogy of stories was released in May 2016. In November 2017 a second volume was released, featuring the Tenth Doctor and Rose Tyler. A third volume is due to be released in 2019 with Tate reprising her role as Donna.