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.As it happens, director José Antonio Nieves Conde was fairly prolific from the 1940s through the 1970s. Unfortunately, he was mostly prolific in Spain, and therefore little known in the United States. I wonder what other gems he has to offer and how easy they would be to track down...This film also features the debut of Ingrid Pitt, which has to be worth something. This is a cheap horror film (invisible dinosaurs are about as inexpensive as it gets), but having Pitt in there makes it quite important in retrospect...

I saw this film in the early seventies, on TV, on a Saturday afternoon. I missed the beginning of the film but VERY shortly got hooked on the storyline. What I saw I LIKED! The movie's simplicity, it being in black and white, and some surprisingly good acting, make this one slick little film! As far as "B" movies are looked upon, this one actually is extremely good!!PLOT SPOILERS AHEAD!!! DO NOT READ FURTHER IF YOU WANT TO WATCH A REALLY SUSPENSEFUL MOVIE!! As stated, the film is about a group of treasure hunters who unwittingly release a terrible, screeching, invisible, dinosaur from inside a cave they were exploring. This beast is large, utterly ferocious, and has long claws.It exudes an animal scream that'll make your skin crawl! It's totally invisible, too--and this low-budget film makes the most of it. The hapless prospectors have only a small house for refuge. They also have an old, broken-down four-wheel drive vehicle parked a medium distance from the house with which to escape. Most of the movie deals with the people trying to devise a way to either kill the beast or escape. You find out later the dinosaur is female and that one of the folks inadvertently took an egg for a souvenir. The egg eventually just begins to hatch, the baby inside, not yet able to achieve invisibility, is smashed to death by the frightened people. The mother creature is constantly prowling around outside, completely unseen. Finally, one of the people devises an ingenious plan to spread flour all around the house so they can have some short warning and know the whereabouts of the animal. BIG SPOILER TO ENDING HERE--DO NOT READ FURTHER!! They eventually conjure up a plan to attract the creature to the vehicle and set the gasoline tank ablaze. This burns the screaming beast to death but, in the sooty smoke, you finally get to see the raptor-like dinosaur revealed. This is a popcorn munching movie, containing constant suspense, very passable acting, a simple plot that WORKS, and very real danger. If you want to kill some time and watch a good film from yesteryear, this is definitely worth your time!

This was included in the "tales of terror" box set so I wasn't expecting anything fantastic. I was not disappointed. The director was clearly trying to save money on the fx by making the monster invisible and by filming in the middle of nowhere and claiming they were in Greece. Judging by the locations, this could have been filmed in Arizona or Mexico. On another subject, who in there right mind would name their child Caliope?? Not only did she have a stupid name, she has to be one of the ugliest women I've ever seen (could she be Keith Richards sister??). I had to cheer the monster when he found her as his next victim. One funny line is before they try to leave one guy says "I put Calliope in her bed, we can send someone to bury her when we get to town".

Sound of Horror was a very pleasant surprise. I bought it as part of Mill Creek Entertainment's Tales of Terror boxed set, and was expected a bad seventies flick along the lines of the Legend of Bigfoot. Instead, I get what has to be one of the better Spanish sci-fi/horror flicks that I've ever seen.True, the fact that the monster is an invisible dinosaur is, to say the least, somewhat lame. But it is carried off fairly well here, as there is a lot of suspense maintained in the film when it really counts. There are few real special effects, with only about three actual optical process shots. The cast is excellent, though the characterizations are pretty stereotypical for the time period.I think that Sound of Horror most reminded me of a Mexican horror movie from the sixties ... but a good one without the expository narration to explain what's happened in the last three films. I enjoyed this movie, and would recommend any genre fans to give it a look.