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Cast
Arthur Franz (Professor Donald Blake)Joanna Moore (Madeline Howard)Judson Pratt (Police Lt. Mike Stevens)Nancy Walters (Sylvia Lockwood)Troy Donahue (Jimmy Flanders)Phil Harvey (Police Sgt. Powell)Helen Westcott (Nurse Molly Riordan)Alexander Lockwood (Professor Gilbert Howard)Whit Bissell (Dr. Oliver Cole)Ross Elliott (Police Sgt. Eddie Daniels)Anne Anderson (Student)Louis Cavalier (Student)Richard H. Cutting (Tom Edwards - Forest Ranger)Eddie Parker (Donald as a Monster)Hank Patterson (Townsend - Night Watchman)Ronnie Rondell Jr. (Student)
Director
Jack Arnold
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Synopsis
The blood of a primitive fish exposed to gamma rays causes a benign research professor to regress to an ape-like, bloodthirsty prehistoric hominid.
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