The woman from the dream Jessie describes as standing over a well during an eclipse is Dolores Claiborne, the main character from Stephen King's 1992 novel of the same name.

The book (Midnight Mass) that Jessie throws at the dog in this movie was written by Kate Siegel's character from Hush (2016) which was also directed by Mike Flanagan.

Gerald refers to the dog as Cujo, which is a reference to the Stephen King book by the same name.

When Gerald says, "All things serve the beam," this was a reference to author Stephen King's "Dark Tower" novel series.

The headboard of the bed is the lower half of the Lasser Glass from Oculus (2013).

Features virtually no soundtrack during the course of the film.

In the novel, the solar eclipse in question is the one of July 20, 1963, whose path of totality crossed Maine. In the movie, it is presumably the one of May 30, 1984, whose path of totality crossed New Orleans.

When Jessie talks about the Moonlight Man's Bag of Bones, this is a likely reference to Stephen King's novel of the same name.

Carla Gugino (Jessie Burlingame), Henry Thomas (Tom) & Kate Siegel (Sally) also worked together on The Haunting of Hill House (2018) as Olivia, Young Hugh Crain & Theodora Crain respectively.

This is the fourth collaboration between Kate Siegel and Mike Flanagan since Oculus (2013), Hush (2016) and Ouija: Origin of Evil (2016).

Based on Stephen King's 1992 homonymous novel.

Gerald saying "we should take our medicine" is a reference to the novel The Shining by Stephen King where Jack tells Danny to "take his medicine".

In Brazil, Stephen King's Dolores Claiborne novel/movie were named Eclipse and Total Eclipse.

Bruce Greenwood is fifteen years and seventeen days older than his on screen wife Carla Gugino.

This was Henry Thomas' first Stephen King project since Nightmares & Dreamscapes: From the Stories of Stephen King (2006).

The beer in the film was from Fairhope Brewery in Fairhope, Al. This brewery is located near where the film was shot on location.

This was the second collaboration between Henry Thomas and director Mike Flanagan since Ouija: Origin of Evil (2016).

At the start of the movie, when the couple are driving in the car a radio news report can be heard discussing the grave robber ('The Moonlight Man')'s latest crimes.

Jessie states that Moonlight Man suffers from a disorder called acromegaly which causes enlargement of the hands and feet, as well as his forehead and chin. That is also why he is so tall. Carel Struycken, who portrays the Moonlight Man, does actually have this disorder.

The events of Dolores Claiborne (1995) take place during the same eclipse featured in this film.

Both the solar eclipse and the acts of incest between Jessie and her father is a motif which also takes place in Stephen King's novel Dolores Claiborne.

In the Stephen King book, the makeshift "straw" Jessie uses is actually a subscription offer card from the inside of a magazine.

When Jessie is walking down the hall towards the Moonlight Man, there is a shot of a rook's skull hanging from his neck. This is a reference to Cuthbert in the Dark Tower series. He was known for having a rook's skull hanging around his neck.