If you loved
The Exorcist III
William Peter Blatty · Film · 1990
What hooked you in The Exorcist III was the way a grounded police procedural collides with an ancient, inexplicable supernatural evil.
Start with the source
The source
Legion
Scott Stewart · Film · 2010
Adaptation
Legion
Noah Hawley · Series · 2017
Books on the same thread
Briarpatch
Ross Thomas · Book · 2003
Like the investigation in The Exorcist III, this mystery centers on a personal tragedy that forces a protagonist to navigate a web of corruption and secrets beyond his control.
The Keep
F. Paul Wilson · Book · 2000
The Exorcist III excels at blending historical dread with modern investigation, and this story mirrors that tension by pitting skeptical soldiers against an ancient, terrifying force in a remote setting.
Godplayer
Robin Cook · Book · 1983
If the clinical horror of The Exorcist III resonated with you, this medical conspiracy explores a similar sense of institutional rot where the most trusted spaces become sites of death.
Harry Bosch
Michael Connelly · Book · 1992
Harry Bosch embodies the same world-weary, obsessive detective archetype seen in The Exorcist III, tackling complex cases where his personal history frequently intersects with the grim reality of the crimes.
Series on the same thread
The Outsider
Richard Price · Series · 2020
This series captures the exact atmosphere of The Exorcist III by forcing a seasoned investigator to reconcile the cold logic of a murder case with an insidious, encroaching supernatural presence.
Blue Exorcist
Series · 2011
While this leans into shonen action, it shares the core conflict of The Exorcist III by focusing on the perpetual, dangerous struggle between the human world and encroaching demonic forces.
Defending Jacob
Mark Bomback · Series · 2020
The Exorcist III relies on the emotional devastation of a crime, and this drama similarly explores how a singular act of violence tears through a family and tests their morality.
Podcasts on the same thread
CounterClock
Audiochuck · Podcast · 2025
Much like the cold case elements in The Exorcist III, this podcast digs into the haunting persistence of past crimes, proving that the shadows of history rarely stay buried for long.
Small Town Murder
James Pietragallo, Jimmie Whisman · Podcast · 2026
This show mirrors the fascination with small-town darkness found in The Exorcist III, deconstructing the unsettling reality behind local murders with a sharp focus on the tragedy of the environment.
Keep exploring
Common questions
Is The Exorcist III based on the same source material as the 2017 Legion TV series?
No, The Exorcist III is a 1990 film written and directed by William Peter Blatty based on his novel Legion. While the 2017 Legion television series shares the same title, it is an unrelated production based on Marvel Comics characters rather than the source material for the film.
Does The Exorcist III have any connection to the 2010 movie titled Legion?
No, The Exorcist III is a horror film focused on a police investigation into a series of ritualistic murders. The 2010 movie titled Legion is a separate supernatural action film about angels and is not connected to the plot or the production of The Exorcist III.
What is the premise of The Exorcist III?
The Exorcist III follows Police Lieutenant Kinderman as he investigates a series of brutal murders involving decapitation and crucifixion. The events occur on the fifteenth anniversary of the original exorcism that resulted in the death of Father Damien Karras, bringing the investigator face to face with a familiar evil.
Should I watch The Exorcist III before starting the 2017 Legion television series?
There is no narrative reason to watch The Exorcist III before viewing the 2017 Legion television series. The film is a horror story centered on a police investigation, while the television series is based on unrelated comic book source material and shares no plot elements or characters with the film.