The Astral Factor 1978

Synopsis:

Demonstrating that a little knowledge is a dangerous thing, a convicted strangler studies the paranormal and finds a way to render himself invisible. Once he escapes, he sets out to find and eliminate the five women who testified in his prosecution. A police lieutenant (Robert Foxworth) sets out to safeguard them, and bring the invisible killer to justice.

Directed by: John Florea
Release date: 1978-02-01
Runtime: 96 minutes
Tagline: What You Can't See...Can Kill You!
Cast:
Robert Foxworth
Robert Foxworth
Lt. Charles Barrett 
Stefanie Powers
Stefanie Powers
Candy Barrett 
Sue Lyon
Sue Lyon
Darlene DeLong 
Mark Slade
Mark Slade
Detective Holt 
Leslie Parrish
Leslie Parrish
Colleen Hudson 
Marianna Hill
Marianna Hill
Bambi Greer