When a single mother and her two young children are tormented by an increasingly strange and intense presence in their quiet suburban home, she turns to her scientist boyfriend to take on the violent forces that paranormal experts are too frightened to face.
Unfortunately the movie The Diabolical is not yet available on HBO Max.
| Writing | Alistair Legrand | Writer |
| Writing | Luke Harvis | Writer |
| Directing | Alistair Legrand | Director |
| Production | Andrew Schwarz | Associate Producer |
| Directing | Cristina Fanti | Script Supervisor |
| Camera | Ronald Batzdorff | Still Photographer |
| Camera | Dean Smollar | Steadicam Operator |
| Crew | Cassandra McCormick | Stunt Double |
