Where to start withLegion
3 versions · originally a film, 2010
Themes: Divine Judgment, Redemption, Last Stand, Chosen One, Faith vs. Doubt.
Start with The Exorcist III (William Peter Blatty, 1990) — the film. Legion exists in 3 versions across media, beginning as a film in 2010; each is ranked below by what it does best.
Each iteration of Legion explores the harrowing intersection of divine intervention, psychological fragmentation, and the struggle against malevolent supernatural forces.
✦ Most fans start here
The Exorcist III (1990)

The original movie
Legion
Scott Stewart · Film · 2010
The 2010 film Legion offers a visceral, high-stakes action premise centered on a desert diner siege, perfect for viewers seeking straightforward apocalyptic thrills and gritty, celestial warfare aesthetics.

1990 film
✦ Start hereThe Exorcist III
William Peter Blatty · Film · 1990
The Exorcist III (1990) delivers a masterclass in psychological horror and investigative dread, providing a sophisticated, chilling experience for those who prefer cerebral storytelling over conventional supernatural action set-pieces.

2017 series
Legion
Noah Hawley · Series · 2017
The 2017 television series Legion provides a surreal, character-driven examination of mental illness and perceived reality, ideal for audiences who want a complex, visually experimental take on extraordinary human potential.
Common questions
Is the 2017 TV show Legion related to the 2010 movie Legion?
No, the 2017 television series Legion and the 2010 film Legion are entirely separate projects. They share the same title but feature different narratives, creative teams, and universes, meaning there is no story connection between the movie and the series.
Does The Exorcist III have any connection to the 2010 movie Legion?
The film The Exorcist III was originally titled Legion during its development and is based on the novel of the same name. While it shares the title Legion, it is a direct sequel to The Exorcist and is not related to the 2010 movie Legion.
Should I watch The Exorcist III if I enjoyed the 2010 movie Legion?
If you enjoyed the 2010 movie Legion, you may appreciate The Exorcist III for its shared title and supernatural horror themes. However, be aware that The Exorcist III is a sequel to a different franchise and offers a distinct tone compared to the 2010 film.
Is Legion the 2017 TV show a sequel to the 2010 movie Legion?
The 2017 TV show Legion is not a sequel to the 2010 movie Legion. The two projects are distinct entities with no shared plot, characters, or production history, despite both using the title Legion for their respective releases.