Niets is wat het lijkt in de wereld van de verzekeringsinspecteur John Trent. Zeker niet nadat hij wordt ingeschakeld om de verdwijning van schrijver Sutter Cane, wiens horrorboeken geleidelijk aan tot een massahysterie zijn gaan leiden, te onderzoeken.
Nee, helaas is In the Mouth of Madness nog niet beschikbaar op Netflix in Nederland.
| Art | Elinor Rose Galbraith | Set Decoration |
| Sound | Jim Lang | Original Music Composer |
| Editing | Edward A. Warschilka | Editor |
| Directing | John Carpenter | Director |
| Production | Sandy King | Producer |
| Sound | John Carpenter | Original Music Composer |
| Camera | Gary B. Kibbe | Director of Photography |
| Writing | Michael De Luca | Screenplay |
| Visual Effects | Rob Coleman | Animation |
| Art | Peter Grundy | Art Direction |
| Costume & Make-Up | Robin Michel Bush | Costume Design |
| Production | Michael De Luca | Executive Producer |
| Art | Jeff Ginn | Production Design |
| Production | Artist W. Robinson | Associate Producer |
| Crew | Jeff Imada | Stunt Coordinator |
| Crew | Alison Reid | Stunts |
| Crew | Shelley Cook | Stunts |
| Sound | Ron Bartlett | Sound Effects Editor |
| Directing | Stuart Williams | Second Second Assistant Director |
| Costume & Make-Up | Donald Mowat | Makeup Artist |
| Directing | Adam Druxman | Second Assistant Director |
| Sound | Owen Langevin | Sound Mixer |
| Costume & Make-Up | James D. Brown | Hairstylist |
| Sound | Robert Thirlwell | Sound Re-Recording Mixer |
| Sound | Donald Flick | Sound Editor |
| Sound | Larry Hoki | Sound Recordist |
| Sound | John Dunn | Supervising Sound Editor |
| Sound | Matthew C. May | Sound Editor |
| Sound | Ken S. Polk | Sound Re-Recording Mixer |
| Sound | John Pospisil | Sound Designer |
| Directing | Artist W. Robinson | First Assistant Director |
| Sound | Jeff Courtie | Foley Mixer |
| Production | Brian Campbell | Location Manager |
| Crew | Danny Lima | Stunts |
