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
Doctor Syn the Disney theatrical version, titled "Doctor Syn, Alias the Scarecrow" and written by Vic Crume. Three film adaptations have been made of Dr. Syn's exploits. The first, "Doctor Syn" (1937), starred the actor George Arliss in the title role and was his last film. "Captain Clegg" (1962), known as "Night Creatures" in the U. S., was produced by Hammer Film Productions with actor Peter Cushing in the lead role, directed by Peter Graham Scott. In the screenplay by Anthony Hinds, the main character's name was changed from Doctor Syn to Parson Blyss to avoid rights problems with Disney's forthcoming version,