Two U.S. Marine investigators looking into a series of grisly murders in Manila discover that the crimes are tied to an amulet with a 400-year-old curse on it that has unleashed supernatural forces.
Unfortunately the movie Demonstone is not yet available on HBO Max.
| Art | Andrew Prowse | Art Direction |
| Art | Frederick Bailey | Other |
| Writing | Frederick Bailey | Writer |
| Writing | David Phillips | Writer |
| Writing | John Trayne | Writer |
| Production | Charles W. Fries | Executive Producer |
| Production | Antony I. Ginnane | Producer |
| Production | Clark Henderson | Line Producer |
| Production | Andrew Prowse | Producer |
| Production | Isabel Sumayao | Line Producer |
| Production | Brian Trenchard-Smith | Executive Producer |
| Sound | Gary Stockdale | Original Music Composer |
| Crew | Kevan Lind | Cinematography |
| Editing | Michael Thibault | Editor |
| Production | Ricky Araneta | Casting |
| Production | Eric Hahn | Casting |
| Production | Rosemary Welden | Casting |
| Art | Sammy Aranzamendez | Art Direction |
| Costume & Make-Up | Violy Puzon | Makeup Artist |
| Production | Marietta Sta. Juana | Production Manager |
| Directing | Gus Alvarez | Second Assistant Director |
| Directing | Clark Henderson | Second Unit Director |
| Directing | Allan Noble | First Assistant Director |
| Directing | Michael Thibault | Second Unit Director |
| Art | Ronnie Jakosalem | Property Master |
| Crew | Ed Sto. Domingo | Special Effects |
| Directing | Andrew Prowse | Director |
