All records in the game machine at the café are held by D.Eath, except the first one, held by T.Pratchett with one point more than second place. The late Sir Terry Pratchett is the co-author of the novel this series is based on.
Crowley puts a Wolfgang Amadeus Mozart CD in his car's player, which starts out playing classical music, then switches to Queen's "I'm in Love With My Car". In the book, any tape in Crowley's car would turn into Queen's "Greatest Hits" after a couple of weeks.
Some of the scenes of Crowley driving the flaming Bentley were made possible by the car being really on fire and David Tennant really driving it.
In Heaven, when Aziraphale is getting his uniform, the world is finally rotating in the proper direction.
The guard at the USAF base gate is reading "American Gods", another Neil Gaiman fantasy epic. American Gods (2017) has also also been adapted into a television series by Starz and is distributed in the UK by Amazon.