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
The Doctor (Doctor Who) the Damned". In the Virgin New Adventures, the Seventh Doctor is shown briefly interacting with a man who may be the Third Doctor in the Sherlock Holmes crossover novel "All-Consuming Fire", but the scene is narrated from the perspective of Dr. Watson and thus the other man is never expressly identified. The Virgin Missing Adventures novel "Cold Fusion" is a unique twist on the traditional multi-Doctor story as it focuses on the Fifth Doctor's adventures before he meets the Seventh, where normal stories treat the later Doctor as 'the' Doctor. The BBC novel "The Eight Doctors" was written by respected