A documentary filmmaker turns his lens on an enigmatic conspiracy theorist who claims he's found the entrance to a vast underground city populated entirely by monsters.
Unfortunately the movie Digging Up the Marrow is not yet available on HBO Max.
| Directing | Adam Green | Director |
| Writing | Adam Green | Writer |
| Production | Cory Neal | Producer |
| Crew | Will Barratt | Cinematography |
| Editing | Will Barratt | Editor |
| Editing | Josh Ethier | Editor |
| Editing | Adam Green | Editor |
| Art | Travis Zariwny | Production Design |
| Art | Alex Pardee | Art Direction |
| Art | Melanie Rein | Set Decoration |
| Costume & Make-Up | Desiree Falcon | Makeup Artist |
| Crew | Robert Pendergraft | Makeup Effects |
| Crew | Shaun Pendergraft | Makeup Effects |
| Crew | Roxanne Pike | Makeup Effects |
| Crew | Caitlyn Brisbin | Makeup Effects |
| Crew | Nic Henley | Makeup Effects |
| Art | Robert Konowalow | Construction Coordinator |
| Art | Anthony Cafaro | Leadman |
| Sound | Mathew Waters | Sound Designer |
| Visual Effects | Alex Pardee | Creature Design |
| Lighting | Zack Wilcox | Gaffer |
| Sound | Bear McCreary | Original Music Composer |
| Production | Adam Green | Executive Producer |
| Production | Andrew Mysko | Executive Producer |
| Production | Alex Pardee | Executive Producer |
