A pathologist experiments with a deaf-mute woman who is unable to scream to prove that humans die of fright due to an organism he names The Tingler that lives within each person on the spinal cord and is suppressed only when people scream when scared.
Darryl Hickman
David Morris
Pamela Lincoln
Lucy Stevens
Patricia Cutts
Isabel Stevens Chapin
William Castle
Prologue Host (uncredited)
Bob Gunderson
Ryerson - Screaming Convict (uncredited)
Dal McKennon
Projectionist (uncredited)
Leon Alton
Member of Silent Movie Audience (uncredited)
Gertrude Astor
Member of Silent Movie Audience (uncredited)
Richard Barthelmess
David Kinemon (archive footage) (uncredited)
