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Written by William Peter Blatty

William Peter Blatty has a writing credit on seven films here, including The Exorcist, A Shot in the Dark and The Ninth Configuration.

What Did You Do in the War, Daddy? 1966 • 1h 56m
Exorcist: The Beginning 2004 • 1h 54m
The Ninth Configuration 1980 • 1h 58m
The Exorcist 1973 • 2h 2m
The Exorcist III 1990 • 1h 50m
Darling Lili 1970 • 2h 23m
A Shot in the Dark 1964 • 1h 42m