·The film was shot at Cinecittà Studios in Rome, where scenes from Africa, Cairo and the Netherlands were all taken from here.
·John Frankenheimer (John Frankenheimer) voluntarily gave up being the director of the film, only one month after his death.
Ryan Phillips and Kerr Smith were both candidates to play Father William.
· Paul Schrader's original version was later titled "Dominion: Prequel to the Exorcist" and was released in 2005.
·The film was originally scheduled to be performed by Michael Arnold Kamen as the soundtrack, but was later replaced by Paul Schrader with Christopher Young (Christopher Young).
·After Paul Schrader was dismissed, a series of chain reactions occurred. The screenwriter Alexi Hawley had to rewrite the script, delete some previous roles, and add some new roles, like Sarah played by Isabella Skorupko , In addition, some actors were replaced due to the inability to reshoot.
The producer once wanted to ask William Friedkin, the director of the first episode, to continue directing the film.
·The film was originally rated as NC-17, and was classified as R-rated after being cut.
· 10% of the version shot by Paul Schrader appears in this film.
