Hank mistakenly refers to Gideon as Siri and Alexa, the virtual assistants developed by Apple and Amazon respectively.
John Constantine's spell for removing the Egyptian goddess of truth Ma'at's truth beetle, "Vi veri universum vivus vici," is Latin for "By the power of truth, I, while living, have conquered the universe." This phrase was also seen in the DC Comics film, V for Vendetta.
This is the first episode of the series to not feature Jes Macallan (Ava Sharpe) after being promoted to a series regular.
Running gags: the Legends keep forgetting about Charlie, President Nixon getting tranquilized (3 times).
Constantine continues to hold to his determination not to wear disguises and to maintain his own uniform/costume, and thus is the only member of the team in the RV not to wear the reunion T-shirt.