Mr Mystery

Mr Mystery was a reader of the website Who is Doctor Who?.

Biography
Following the Dummy Massacre on 26 March 2005, (PROSE: The Doctor Was Involved in the Dummy Massacre) in which Rose Tyler left Earth to travel in the TARDIS with the Ninth Doctor, (TV: Rose) Mr Mystery responded to Who is Doctor Who?'s request for sightings of Rose, saying only that he had seen Rose before, but could not say where or when, for he was Mr Mystery. (PROSE: The Doctor Was Involved in the Dummy Massacre)