Intent on discovering why Regan (Linda Blair) was possessed by the demon Pazuzu, Father Lamont (Richard Burton) travels to Africa in search of another who was once possessed by the same demon -- and learns that Pazuzu traverses the world via locusts. But when Father Lamont returns to New York, he discovers Pazuzu has reached Regan again through Dr. Gene Tuskin's (Louise Fletcher) hypnosis machine.
James Earl Jones,
Max von Sydow,
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