Good Omens Teaser Trailer: 10 Things You Might've Missed
7. Raising Warlock
One of the greater sources of stress and hilarity in the book was the many years Aziraphale and Crowley spend trying to convert the apparent Anti-Christ—the rich son of an American cultural attache, Warlock, to the side of good, if only to ensure he didn't try to start Armageddon and would instead become an upstanding human boy.
For years, Crowley had to spend his time as Nanny (seen briefly in the opening montage), with Aziraphale as gardener, and then the two becoming tutors, before eventually coming as entertainers to the birthday when he was meant to manifest his power.
Another scene in the trailer has Aziraphale covered in cake and he and Crowley realising that they've just made one of the biggest mistakes of their long, long, lives—the fact that they'd lost track of the Anti-Christ.