When a group of isolated people in the Greek mountains set off a cave explosion, they are menaced by an invisible shrieking dinosaur that had been buried for eons.
Sound of Horror
Also Known As: El sonido de la muerte, Sound from a Million Years Ago, The Prehistoric Sound
Released: 08 Oct 1967
Directed By: José Antonio Nieves Conde
Written By: Sam X. Abarbanel (original story), Sam X. Abarbanel (screenplay), Gregg G. Tallas (screenplay), José Antonio Nieves Conde (screenplay), Gregorio Sacristán de Hoyos (screenplay)