The Astral Factor/ Invisible Strangler 1984 ‧ Horror/Sci-fi

A convicted strangler, studying the paranormal in his jail cell, learns to make himself invisible. As an invisible man, he escapes from prison to stalk and strangle the five women who testified against him at his trial. Robert Foxworth plays the police lieutenant assigned to protect them, and to catch the invisible strangler.

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1978 movie, not 1984.