Arthur Conan Doyle was a doctor and a mystery writer who believes in spiritualism. He had killed his most popular character, Sherlock Holmes.
Episodes
"Elementary, My Dear Murdoch"
Doyle came to Toronto to investigate spiritualism. He had heard of Murdoch's handling of a murder case. Doyle took Murdoch with him to a seance. During the seance, a young woman supposedly spoke through the spiritualist to tell Murdoch that she had recently been murdered and was buried in a shallow grave. The "communication" later proved to be fraudulent, but Doyle assisted Murdoch in the investigation, primarily by asking questions that were not based on logic.
"Belly Speaker"
Doyle returned to Toronto, allegedly researching a case for a story to be based on William Murdoch. He eventually admitted that he was actually seeking a practitioner of Chinese medicine in the hopes of finding a cure for his wife, who was dying of consumption. Once again, his conversations with Murdoch led the detective to think outside his usual logical paths.