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
| Directing | José Antonio Nieves Conde | Director |
| Production | Gregorio Sacristán | Producer |
| Sound | Luis de Pablo | Original Music Composer |
| Camera | Manuel Berenguer | Director of Photography |
| Editing | Margarita Ochoa | Editor |
| Art | Gil Parrondo | Production Design |
| Art | Luis Pérez Espinosa | Production Design |
| Art | Gil Parrondo | Art Direction |
| Art | Luis Pérez Espinosa | Art Direction |
| Art | Román Calatayud | Set Decoration |
| Art | Julio Molina | Set Decoration |
| Writing | Sam X. Abarbanel | Original Story |
| Writing | Sam X. Abarbanel | Screenplay |
| Writing | Gregg Tallas | Screenplay |
| Writing | José Antonio Nieves Conde | Screenplay |
| Writing | Gregorio Sacristán | Screenplay |
| Costume & Make-Up | Carlos Nin | Makeup Artist |
| Costume & Make-Up | Maria Ortega | Hairdresser |
