A couple and their six-year-old son move into an old Connecticut house where the boy soon becomes distraught with thoughts of monsters dwelling in the attic. When their friends and guests abruptly go missing or die mysteriously, it becomes a race against time as the family's lives are in peril.
Unfortunately the movie The Devil's Mercy is not yet available on HBO Max.
| Directing | Melanie Orr | Director |
| Writing | James A. McLean | Writer |
| Production | Eric Beldowski | Line Producer |
| Production | Emlyn J. David | Executive Producer |
| Production | Kate Harrison Karman | Executive Producer |
| Production | Jacqueline Kelly | Executive Producer |
| Production | Barbara Sacks | Executive Producer |
| Production | Lewin Webb | Executive Producer |
| Production | Robert Wilson | Producer |
| Sound | Ryan Latham | Original Music Composer |
| Sound | Catalin Marin | Original Music Composer |
| Camera | Joe Turner | Director of Photography |
| Editing | James P. Villeneuve | Editor |
| Production | Dean E. Fronk | Casting |
| Production | Donald Paul Pemrick | Casting |
| Crew | Felipe Rodriguez | Thanks |
