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
Dr. Watson (debugger) Dr. Watson (debugger) Dr. Watson is an application debugger included with the Microsoft Windows operating system. It may be named codice_1, codice_2 or codice_3, depending on the version of Windows. It is named after Doctor Watson of Sherlock Holmes fame, the idea being that it would collect error information (symptoms) following a program crash. The use of the word "Watson" has since been expanded to include general end-user feedback services. The original name of this diagnostic tool was "Sherlock". The information obtained and logged by Dr. Watson is the information needed by technical support personnel to diagnose a program error