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
