A group of friends fight for their lives against bloodthirsty creatures lurking in an underground military base.
Unfortunately the movie Underground is not yet available on HBO Max.
| Writing | Charles Morris Jr. | Writer |
| Art | Merje Veski | Set Decoration |
| Production | Anthony Gudas | Producer |
| Production | Joey Paul Jensen | Casting |
| Costume & Make-Up | Jayme Bohn | Costume Design |
| Costume & Make-Up | Myke Michaels | Makeup Department Head |
| Crew | Ron Karkoska | Makeup Effects |
| Costume & Make-Up | Michelle Lang | Set Costumer |
| Production | Niner Parikh | Casting Associate |
| Costume & Make-Up | Emmy Taylor | Wardrobe Supervisor |
| Production | Sarah Maria Newman | Production Coordinator |
| Camera | Zoran Popovic | Director of Photography |
| Sound | Maciek Krakówka | Foley |
| Sound | Eric Maldin | Foley Editor |
| Camera | Addae Shelby | Key Grip |
| Directing | Kimberley Roper | Script Supervisor |
| Production | Cullen Thomas | Location Manager |
| Art | MeSun Barnett | Assistant Property Master |
| Camera | Matthew Minke | Dolly Grip |
| Crew | Ana Preciado | Makeup Effects |
| Lighting | Ryan Meyer | Gaffer |
| Lighting | Jon Arturi | Electrician |
| Art | Adri Siriwatt | Property Master |
| Lighting | Brett Heicher | Electrician |
| Sound | Chris Trueman | Boom Operator |
| Camera | Tamas Mack | First Assistant Camera |
| Visual Effects | Adam Lima | Visual Effects Supervisor |
| Camera | Shelby Goldstein | Still Photographer |
| Costume & Make-Up | Janette Nielsen | Key Makeup Artist |
| Lighting | Kevin Pittman | Electrician |
| Directing | Rafael Eisenman | Director |
| Art | Frank Bollinger | Production Design |
| Sound | Robert Folk | Original Music Composer |
| Crew | Spice Williams-Crosby | Stunt Coordinator |
| Crew | Kelly Bellini | Stunt Double |
