Dirección: William Castle
Un médico descubre que el cuerpo humano, al padecer una fuerte impresión, es capaz de crear una criatura que se extiende a lo largo de su columna vertebral. Su peor ocurrencia será pretender extraerla de un cuerpo.
Vincent Price
Dr. Warren Chapin
Philip Coolidge
Oliver 'Ollie' Higgins
Judith Evelyn
Mrs. Martha Ryerson Higgins
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)
Gail Bonney
Member of Silent Movie Audience (uncredited)
Pat Colby
Member of Silent Movie Audience (uncredited)
George DeNormand
Member of Silent Movie Audience (uncredited)
Amy Fields
Member of Silent Movie Audience (uncredited)
Clarence Straight
Member of Silent Movie Audience (uncredited)
Ernest Torrence
Luke Hatburn (archive footage) (uncredited)
Vincent Price
Dr. Warren Chapin
Philip Coolidge
Oliver 'Ollie' Higgins
Judith Evelyn
Mrs. Martha Ryerson Higgins
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)
Gail Bonney
Member of Silent Movie Audience (uncredited)
Pat Colby
Member of Silent Movie Audience (uncredited)
George DeNormand
Member of Silent Movie Audience (uncredited)
Amy Fields
Member of Silent Movie Audience (uncredited)
Clarence Straight
Member of Silent Movie Audience (uncredited)
Ernest Torrence
Luke Hatburn (archive footage) (uncredited)
Vincent Price
Dr. Warren Chapin
Philip Coolidge
Oliver 'Ollie' Higgins
Judith Evelyn
Mrs. Martha Ryerson Higgins
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)
Gail Bonney
Member of Silent Movie Audience (uncredited)
Pat Colby
Member of Silent Movie Audience (uncredited)
George DeNormand
Member of Silent Movie Audience (uncredited)
Amy Fields
Member of Silent Movie Audience (uncredited)
Clarence Straight
Member of Silent Movie Audience (uncredited)
Ernest Torrence
Luke Hatburn (archive footage) (uncredited)