In one scene, Steven Grant passes by a QR code on a museum wall. The QR code actually works and when scanned, it redirects to a page on the official Marvel website where it's possible to read a free digital copy of "Werewolf By Night #32", originally published in 1975, where Moon Knight made his Marvel Comics debut. After the following episodes were released, the QR code redirected to the comics related to the latest episode.
On an interview special with the Empire Podcast, director Mohamed Diab revealed that the start of this episode was originally meant to be the start of Summon the Suit (2022).
The castle shown is Castle Eltz, located in the Eifel region in Germany. However, Castle Eltz is not surrounded by snowy mountains and there is no visible city nearby, so the castle has been copied to this landscape by VFX.
The song that was playing while Steven was preparing to go for the date is an Egyptian song (Bahlam Maak by Nagat). Its title translation is "I Dream With You".
The book Steven can be seen reading from about the Ennead is "Ancient Egypt" by Richard Mayde.