In the series Inspector Brackenreid says he is from Sheffield, England. In real life, Thomas Craig, who plays the inspector was actually born in Sheffield, England.
Constable Crabtree has written a book, and Inspector Brackenreid asks for a signed copy. Crabtree opens the book, dips his pen in the ink well, signs the book, closes it without using a blotter and hands it to Inspector Brackenreid.
Although the credit on each episode reads "Inspector William Murdoch", he is actually a Detective. In Episode 1.2 Murdoch applies for the position of Inspector, but is turned down and it is made clear that he will never get that promotion.