After giving a cricket lesson, Brackenreid utters the phrase "Here endeth the lesson," which is a traditional wrap-up phrase after a Bible reading in church, especially from the King James version. It was common up until about the 1950s.
At about 19:44, a suspect mentions the Battle of Pirot, fought outside the town of Pirot, Serbia (near the border with Bulgaria) in 1885. The battle would lead to the Treaty of Bucharest, which ended the Serbo-Bulgarian War.
Oshawa, Ontario, Canada, lies on the Lake Ontario shoreline, in Southern Ontario, about 60 km (37 mi) east of Downtown Toronto (in 2021). Its name comes from the Ojibwa 'aaz haway', meaning "the crossing place". As headquarters to General Motors Canada, Oshawa used to be called the Automotive Capital of Toronto.
At about 10:27, Murdoch mentions the explosive Lyddite, which consists chiefly of picric acid, a trinitro-aromatic compound related to TNT. Used extensively by the British in World War I, the explosive was named after Lydd, Kent (in southern England) where it was first tested in 1885. Picric acid has also been used to dye wool and silk yellow, and soldiers who worked with it were called "canaries" for their yellow-stained hands. Medical uses in the past have included treatments for malaria, smallpox, and herpes; as antiseptics; and for staining in forensic and histology labs.
Johann Heinrich Schmelzer (c. 1620-80) was an Austrian violinist, court musician of the Habsburgs, and prolific composer of dance music. He attained a high stature in a field dominated at the time by Italian violinists. Dr. Newsome's assertion notwithstanding, Schmelzer's birthday is unknown.