Filmed in Canada, at the end of the episode they use Canadian and American money.
In the beginning of the episode, one of the characters is dressed as King Arthur from the story of King Arthur and Merlin. Katie McGrath, who plays Sarah Bennett, starred as Morgana in the BBC show, Merlin (2008), as well as playing Elsa in King Arthur: Legend of the Sword (2017).
Verna McBride, an Irish-American character lives in house number 353. +353 is the international dialing code for Ireland.