'Īnother Easter egg: Flanagan himself appears in a cameo in episode 3. She continued, 'If you look, there's a screengrab in Hush where you're looking at Maddie's computer screen and it says, 'The red and blue lights of the cop car twinkle off the Jesus fish.' That's the first shot of Midnight Mass. We can use that so we can use those pages and we can use that story.' 'Mike was like, 'Oh, I have this now-defunct idea for a novel called Midnight Mass. We needed a book that wouldn't cost us any money,' Siegel told Pop Culturalist. 'Because was a low-budget movie, we needed a story that Maddie, the main character could write - she's an author in the story.
Kate Siegel, who plays Erin Greene, starred in the 2016 horror Hush as an author who writes a book titled Midnight Mass.