A college paleontology professor acquires a newly discovered specimen of a coelacanth, but while examining it, he is accidentally exposed to its blood, and finds himself periodically turning into a murderous Neanderthal man.
Arthur Franz
Donald Blake
Joanna Moore
Madeline Howard
Judson Pratt
Lt. Mike Stevens
Troy Donahue
Jimmy Flanders
Nancy Walters
Sylvia Lockwood
Helen Westcott
Nurse Molly Riordan
Ross Elliott
Sgt. Eddie Daniels
Alexander Lockwood
Prof. Gilbert Howard
