"The Exorcist" was published in 1971, so it predates this episode.  This one was inspired by the Dybbuk story.  I agree that this is a creepy episode, but I don't find it too disturbing - insanely annoying and loud, yes.  I have to lower the volume if I listen to this one.  Hey - I wonder why Mercedes McCambridge didn't star in this one??  BWAHAHAHA!!  Anyway, I don't think this is outstanding.  It's only sensationalized and was only produced to capitalize on the popularity of demonic possession stories after the "Exorcist" film was released in 1973, and it was recorded on Halloween, after all.zz