Lt. Charles Barrett
Robert Foxworth
Candy Barrett
Stefanie Powers
Detective Sloan
Frederick Tully
Roger Sands - The Invisible Strangler
Frank Ashmore
Mario
Cesare Danova
Jacobs
Eddie Firestone
Kingsley
Bill Overton
Policewoman
Jennifer Burton
Jim, Medical Examiner
George Cheung
Cop in Alley
Albert Cole
Harbormaster
John Hart
Carlotta Sands
Jo Anne Meredith
Darlene DeLong
Sue Lyon
Detective Holt
Mark Slade
Colleen Hudson
Leslie Parrish
Bambi Greer
Marianna Hill
Chris Hartman
Elke Sommer
Captain Wells
Percy Rodriguez
Dr. Ulmer
Alex Dreier
Sgt. Archer
Rayford Barnes
Director
John Florea
Screenplay
Arthur C. Pierce
Producer
Earle Lyon
Director of Photography
Alan Stensvold
Executive Producer
Fred Jordan
Gene Fowler Jr.
Music
Bill Marx
Alan Oldfield
Richard Hieronymus
Editor
Bud S. Isaacs
Script Supervisor
Jane Ficker