It’s impossible to deny the impact of William Friedkin’s 1973 horror masterpiece, The Exorcist. The possession flick, starring Ellen Burstyn as Chris MacNeil, a mother trying to save her possessed daughter Regan (Linda Blair), redefined horror. The film was a critical and commercial success and launched a franchise that included the follow-up Exorcist II: The Heretic, which failed to meet its predecessor’s success, and The Exorcist III. The latter, an underrated horror classic, is now available to stream for free on Tubi.