
Police try to track down a hooded serial killer who murders his victims with a combination of acid and poison gas.

Inspektor Higgins

Ann Portland

Betty Falks

Sir John

Keyston

Mark Denver

Harriet Foster

Secretary

Frank Keeney

Glenn Powers

Greaves
Bannister

Harrison

Brent

Sergeant Hanfield
Cress Bartling

Dr. Shinewood

Carrington

Mary Houston

June Bell
Mildred Miller

Pam Walsbury

Busschaffner
Winston Robson

Dr. Cabble
Screenplay
Screenplay

Director

Producer
Director of Photography

Novel
Editor

Original Music Composer

Assistant Director
Assistant Camera
Still Photographer
Still Photographer
Camera Operator
Assistant Camera
Costume Design
Makeup Artist
Makeup Artist

Production Design
Production Design
Assistant Editor
Sound
Line Producer
Production Manager
Unit Manager
Unit Manager
Unit Manager