Factual error: The movie takes place in 1860, yet Ripper wields an 1862 police model Colt revolver.
Factual error: The plot takes place in 1860, but the summons to the Court of Enquiryour is in the name of William III, who died in 1702, and even William IV died in 1837. The correct monarch for 1860 would have been Victoria. (00:14:00)