An obsessed pathologist discovers and captures a parasitic creature that grows when fear grips its host.
William Castle
Vincent Price
Philip Coolidge
Judith Evelyn
Darryl Hickman
Pamela Lincoln
Patricia Cutts
Bob Gunderson
Dal McKennon
Leon Alton
Gertrude Astor
Richard Barthelmess
Gail Bonney
Pat Colby
George DeNormand
Columbia Pictures
William Castle Productions
