: Jodie Whittaker as the Doctor , Mandip Gill as Yaz , Tosin Cole as Ryan , and Bradley Walsh as Graham .
: An inexperienced junior medic who must step up after Astos's death. [S11E5] The Tsuranga Conundrum
: The lead medic who is killed early on while trying to contain the Pting. : Jodie Whittaker as the Doctor , Mandip