The sequels
Exorcist II, The Exorcist III, Exorcist: The Beginning and The Exorcist: Believer.
The true cases
The Exorcism of Emily Rose and The Pope's Exorcist.
The sequels and their heirs.
Exorcist II, The Exorcist III, Exorcist: The Beginning and The Exorcist: Believer.
The Exorcism of Emily Rose and The Pope's Exorcist.