Set fifteen years after the original film, The Exorcist III centers around the philosophical Lieutenant William F. Kinderman who is investigating a baffling series of murders around Georgetown that all contain the hallmarks of The Gemini, a deceased serial killer. It eventually leads him to a catatonic patient in a psychiatric hospital who has recently started to speak, claiming he is The Gemini and detailing the murders, but bears a striking resemblance to Father Damien Karras.
- Genre: Horror, Mystery
- Studio: Morgan Creek Productions, 20th Century Fox
- Keyword: death penalty, suspicion of murder, exorcism, doomed man, religion and supernatural, investigation, possession, priest, psychiatric hospital, series of murders, missing person, catholic church, demonic possession, supernatural horror
- Cast: George C. Scott, Ed Flanders, Brad Dourif, Jason Miller, Nicol Williamson, Scott Wilson