Calificación
Reparto

John Carradine
Dr. Charles Conway

Myron Healey
Mark Houston

Allison Hayes
Grace Thomas

Marilyn Buferd
Dr. Sharon Gilchrist

Tor Johnson
Lobo

Arthur Batanides
Danny Green

Sally Todd
Natalie Andries

Harry Fleer
Harry Jedrow

Roy Gordon
Dr. Loren Wright

Guy Prescott
Police Captain George Reagan

Raymond Guth
Police Officer Miller

Paul McWilliams
Police Officer Ed

Gloria Petroff
Screaming Woman

Karl Johnson
Monster in Basement (uncredited)

Harry Wilson
Monster in Basement (uncredited)