Notes: Spanish. A Zurbano Films Production. 85 minutes (= 6 hours with the pain chill factor).
Starring James Philbrook
Arturo Fernandez
Soledad Miranda
Ingrid Pitt
Jose Bodalo
Francisco Piquer
Andre: Antonio Casas

Produced: Gregorio Sacristan
Directed: J.A. Nieves Conde
Story: Sam X. Abarbanel
Screenplay: Sam X. Abarbanel, Gregg Tallas, Jose Antonio Nieves Conde, Gregorio Sacristan
Special Effect: Manuel Baquero

Summary: Maria, her uncle Andre, and Strabos play with dynamite in a cave, hunting for Greek treasure. A fossilized egg is all they find, but we see another one hatch a dark blob which immediately disappears. Back home, Andre announces to a grim and superstitious servant, Calliope, "As far as I'm concerned, if the devil comes out of that cave, we'll invite him to the house. We see cave footage of nothing.

Another explosion unearths a mummy, declared Neanderthal, but Andre still wants gold. Guests arrive, prompting reflections on youth, "the war," and the fact that these three men have both portions of a map which 15 men have died for already. Back in the cave we now hear that the mummy dates back to the siege of Troy. Meanwhile, Maria is counting on a dowry. Pete loves his car, Diana. The treasure-hunters dig up bones of the diggers killed in order to keep the location secret, but they need dynamite to proceed, and leave Strabos studying the mummy. "Nothing" creeps up on Strabos and slashes him to death, roaring and squawking. The others return, determine something drained Strabos' blood, hear the creature's noise, and run away.

Calliope's superstitiousness is dismissed as the type of thinking rampant "before the atom bomb," of another age. Back to the cave with dynamite, they decide to bury Strabos tomorrow. But they hear the noise again, see nothing, run home, and lock up the house. One guy has been bitten in the leg. "There's something in that cave that's not of this earth. But further talk of the ancient Greek art treasures keeps the quest alive, despite arbitrary comments such as, "somebody's going to push a button, then we'll all be living in caves." Close-ups on the egg-rock on the mantle are supposed to be ominous.

When the egg hatches, Andre smashes it and it is cast into the fire. Calliope goes outside for water. "Maybe some music will help," says a young woman, but, wouldn't you know, practically unavoidable on AM radio, it's the Dies Irae. Calliope screws around until finally she is slashed by the invisible thing. The rest run into the house, which the creature circles. More glib A-bomb talk serves as a lullaby, but Andre can't sleep. He wanders out to Calliope's corpse, then fondles dynamite. He tries to blow up the cave but is slashed as the explosives bring down the mountain. "It's over; no sound from in there."

But the kitchen is destroyed and tracks were left in the spilt flour. Pete's car won't start, so back to the house where Maria gets a glimmer of the creature in one of the bedrooms and is trapped until their decoy plan works. The wounded-leg guy wants to sacrifice himself rather than suffer amputation, but first the plan is to spread flour in the field so they can see by the tracks where the creature is. It works, sort of: they throw hatchets which stick (in the air), but the creature keeps coming and subsequently wanders away, merely bleeding. The car works this time, but blood appears on the windshield. The creature was riding on top of the car. All run from the car except the leg-guy, who lights a fuel can and blows up himself, the car, and the creature. Screams come from the fire and we ponder, "was it all worth it?"

Commentary: No it wasn't.