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Cast
Boris Karloff
Dr. Leon Kravaal
Roger Pryor
Dr. Tim Mason
Jo Ann Sayers
Nurse Judith Blair
Stanley Brown
Bob Adams
John Dilson
John Hawthorne
Hal Taliaferro
Sheriff Stanton
Byron Foulger
Dr. Bassett
Charles Trowbridge
Dr. Harvey
Ernie Adams
Pete Daggett
Minta Durfee
Frozen Therapy Patient (uncredited)
Charles Miller
Doctor Spectator Explaining Procedure (uncredited)
Eddie Dew
Doctor Spectator Listening to Explanation (uncredited)
