Nate spewing his drink on Ray was improvised.
This is the first episode since Tender Is the Nate (2018) to feature all of the series regulars or show Nate using his Steel powers.
Neron can be heard whistling "Pop! Goes the Weasel" several times throughout this episode.
The battle between a Mallus-possessed Damien Darhk and Beebo gets a mention, as well as Constantine's encounters with Nora.
Nora tells John "I know how hard it is to watch someone you love become a demon", likely referring to the season 3 episode "The Good, The Bad and The Cuddly" when her dad became Mallus's vessel to save her life, and subsequently died moments later when Mallus assumed his true form. John then says, "Yeah, well too bad there aren't any Beebos around to hug it to death!" referring to when the Legends used the Totems of Zambesi in the same episode to conjure a warrior (which assumed the form of a gigantic Beebo doll), which ultimately killed him by body slamming him in a hug-like fashion.