In the Casanova Club sequence at the beginning of the episode, there is a poster behind Johanna Constantine (at the 1:114 mark) promoting Muchas Membrane. Fans of the Hellblazer comic book series (or the TV series "DC's Legends of Tomorrow") may recognize this as an homage to the source material and the character of John Constantine. In both Hellblazer and Legends of Tomorrow, Constantine is revealed to have been the lead singer for Mucous Membrane, a punk band in the late 1970s.
Due to Covid travelling restrictions during filming, the New York scenes in this episode were filmed at Canary Wharf in London. Some notable Canary Wharf landmark buildings such The East Wintergarden and One Canada Square are visible in some shots.