Just one enchanted jewel stands between earth and an army of evil spirits led by the devious ghoul, Phears. With the help of his new girlfriend and ghost pals, Max Doyle races to find the crystal and save the world.
Unfortunately the movie Mostly Ghostly 3: One Night in Doom House is not yet available on HBO Max.
| Crew | Brett Armstrong | Stunt Coordinator |
| Production | Arthur Cohen | Producer |
| Writing | Ron Oliver | Screenplay |
| Writing | R.L. Stine | Story |
| Production | Steven Stabler | Producer |
| Art | Paul McCulloch | Production Design |
| Production | Yvonne Bernard | Producer |
| Production | Catherine Stroud | Casting |
| Directing | Ron Oliver | Director |
| Production | Lisa London | Casting |
| Camera | Thomas M. Harting | Director of Photography |
| Production | Blake Michael | Co-Producer |
| Sound | Peter Allen | Original Music Composer |
| Production | Harvey Kahn | Executive Producer |
