The Doctor (Doctor Who) credits Tennant as "Doctor Who". The credit reverted to "The Doctor" for 2005's Christmas special "The Christmas Invasion" and all subsequent stories at Tennant's request. Matt Smith, Peter Capaldi and Jodie Whittaker have continued to be credited as "The Doctor". John Hurt plays a mysterious past incarnation of the Doctor in the 50th anniversary special "The Day of the Doctor", with minor roles in "The Name of the Doctor" and mini-episode "The Night of the Doctor", created as a "mayfly Doctor" by Steven Moffat. In the television episodes, he is credited as "The Doctor", but he is introduced as "The
First Doctor along with Susan Foreman, before Clara Oswald tells him to steal a different one (colourised footage taken from "The Aztecs"). He is also seen for a brief second wandering around the Doctor's mind in the end of "The Name of the Doctor," although this time a double was used. He also makes a brief appearance (again using a double) during Missy's exposition of the Twelfth Doctor's battle with android assassins ("The Witch's Familiar"). In "Dimensions in Time" the Fourth Doctor (Tom Baker) refers to the First as "the grumpy one". A sculpture of his head, along with that of the