After a drug-fueled night of violence, a group of young degenerates and their hostages find themselves stranded in a remote, abandoned church in rural Spain. Their evening of debauchery and blasphemy quickly turns to greed when they discover a local legend that tells of a vast fortune guarded by mummies in the catacombs beneath the ruins. Their lust for the treasure is short-lived as they find that the supernatural horror in the catacombs is something further than fear… it is Beyond Terror!
| Writing | Miguel Lizondo | Writer |
| Writing | Juan Piquer Simón | Writer |
| Production | Juan Piquer Simón | Executive Producer |
| Writing | Tomás Aznar | Writer |
| Directing | Tomás Aznar | Director |
| Crew | Pablo Pérez | Special Effects |
| Costume & Make-Up | Pedro Camacho | Makeup Artist |
| Directing | Ana Fernández | Second Assistant Director |
| Crew | Julio Bragado Darman | Cinematography |
| Crew | Francisco García San José | Special Effects |
| Production | Francisco Ariza | Production Manager |
| Art | Gumersindo Andrés | Set Decoration |
| Camera | Ricardo Andreu | Camera Operator |
| Directing | Mercedes Segura | Script Supervisor |
| Camera | Fernando Fernández | Assistant Camera |
| Production | Vicente Vega | Production Assistant |
| Crew | Tino Volpi | Transportation Captain |
| Editing | María Luisa Soriano | Editor |
| Directing | Hermenegildo Romero | Assistant Director |
| Camera | Julián Fernández | Grip |
| Directing | Amparo F. Roces | Assistant Director |
| Production | Carlos Sanz | Production Assistant |
| Lighting | Rafael Curonisy | Gaffer |