The Exorcist was made into the movie "The Exorcist III" in 1990. Like "The Exorcist", it involves demonic possession. The book was the focus of a court case over its exclusion from "The New York Times" Best Seller list. Blatty based aspects of the Gemini Killer on the real-life Zodiac Killer, who, in a January 1974 letter to the "San Francisco Chronicle", had praised the original "Exorcist" film as "the best satirical comedy that I have ever seen". The Exorcist is a 1973 American supernatural horror film directed by William Friedkin, adapted by William Peter Blatty from his 1971 novel of the
The Exorcist (film) "The French Connection". After a standoff with the studio, which initially refused to budge over Rydell, Blatty eventually got his way. Principal photography for "The Exorcist" began on August 21, 1972. The shooting schedule was estimated to run 105 days, but ultimately ran well over 200. Friedkin went to extraordinary lengths manipulating the actors, reminiscent of the old Hollywood directing style, to get the genuine reactions he wanted. Yanked violently around in harnesses, both Blair and Burstyn suffered back injuries and their painful screams were included in the film. Burstyn injured her back after landing on her coccyx when a