When Murdoch is questioning Richard Binney about a murder, Murdoch asks if Binney had been in the same room as Nathaniel Horton. Binney says yes, so Murdoch then asks "Did you see who killed him?" However, it was Andrew Nesbitt who had just been killed, not Horton.
If the episode is set in 1895 as stated under Trivia, why is the letter from Dr Grout to Nurse Berrington dated September 1896?
When Murdock dreams of himself getting killed, we see the killer standing in the hallway with a loaded crossbow. When the bolt leaves the crossbow, the loading string is never released and the bolt is moved by using a pulling wire.
When the grim reaper shoots someone in the institute with a crossbow, it is still drawn after the shot.
Murdoch rides his bike at night. The bike has a light on its front.
It was not until 1897, that the American Badger Brass Company, of Kenosha, WI, advertised the first practical acetylene gas bicycle lamp. Known as the "Solar", it was an invention of intricate design.
When Miss Pringle is playing the violin, her fingers are not coordinated with the music.