Both the actor Peter Stebbings who plays Murdoch's Nemesis, James Pendrick, and his real life wife are in episodes of Murdoch Mysteries. His wife is Charlotte Sullivan who plays both Charlotte and Minerva Fairchild in other episodes.
The title is taken from This is Spinal Tap(1984). Nigel Tufnel, pointing to volume control on amplifier: "This one goes to eleven. Its one louder innit?"
Velcro under constables helmets was not invented until 1941.
This episode takes place in 1897.