Beast of Hollow Mountain: Guy Madison, Patricia Medina. Neanderthal man: Robert Shayne, Joyce Terry, Richard Crane. Beast of Hollow Mountain originally produced as a motion picture in 1956. Neanderthal man originally produced as a motion picture in 1953.
Summary:
Beast of Hollow Mountain: A rancher suspects his neighbor is a cattle rustler, until he encounters the real culprit--a prehistoric carnivore! The Neanderthal man: In a peaceful town of the High Sierras, Professor Cliff Groves sets out to prove his unpopular theory that primitive man was the intellectual equal of ourselves. Using himself as a guinea pig, he begins a series of dangerous injections which, when previously tested on an ordinary house cat, produced a sabre-toothed tiger. Groves soon reverts to primal man, a cunning, hungry animal with the uncontrollable urge to kill.
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