A college paleontology professor acquires a newly discovered specimen of a coelecanth, but while examining it, he is accidentally exposed to its blood, and finds himself periodically turning into a murderous Neanderthal man.
Genres:
Arthur Franz as Donald Blake
Joanna Moore as Madeline Howard
Judson Pratt as Lt. Mike Stevens
Troy Donahue as Jimmy Flanders
Nancy Walters as Sylvia Lockwood
Helen Westcott as Nurse Molly Riordan
Ross Elliott as Sgt. Eddie Daniels
Alexander Lockwood as Prof. Gilbert Howard
Whit Bissell as Dr. Oliver Cole
Richard H. Cutting as Tom Edwards - Forest Ranger
Hank Patterson as Townsend - Night Watchman
Phil Harvey as Sgt. Powell
Eddie Parker as Donald as a Monster
Ronnie Rondell Jr. as Student
Anne Anderson as Student
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