How Awful About Allan is a 1970 television movie thriller, directed by Curtis Harrington and starring Anthony Perkins. It premiered on ABC in the fall of 1970 and was produced by prolific television producer Aaron Spelling.
This B horror classic is Spanish made. It’s about a group of people in Greece that set off an explosion in a cave, releasing an invisible, noisy dinosaur monster. Also known as El sonido de la muerte.