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.
| Writing | Michael De Luca | Screenplay |
| Sound | John Carpenter | Original Music Composer |
| Sound | Jim Lang | Original Music Composer |
| Production | Sandy King | Producer |
| Art | Elinor Rose Galbraith | Set Decoration |
| Camera | Gary B. Kibbe | Director of Photography |
| Directing | John Carpenter | Director |
| Editing | Edward A. Warschilka | Editor |
| Visual Effects | Rob Coleman | Animation |
| Production | Michael De Luca | Executive Producer |
| Costume & Make-Up | Robin Michel Bush | Costume Design |
| Art | Jeff Ginn | Production Design |
| Production | Artist W. Robinson | Associate Producer |
| Art | Peter Grundy | Art Direction |
| Crew | Jeff Imada | Stunt Coordinator |
| Crew | Alison Reid | Stunts |
| Crew | Shelley Cook | Stunts |
| Sound | Robert Thirlwell | Sound Re-Recording Mixer |
| Costume & Make-Up | James D. Brown | Hairstylist |
| Directing | Stuart Williams | Second Second Assistant Director |
| Sound | Donald Flick | Sound Editor |
| Costume & Make-Up | Donald Mowat | Makeup Artist |
| Directing | Adam Druxman | Second Assistant Director |
| Directing | Artist W. Robinson | First Assistant Director |
| Sound | John Dunn | Supervising Sound Editor |
| Sound | John Pospisil | Sound Designer |
| Sound | Matthew C. May | Sound Editor |
| Sound | Jeff Courtie | Foley Mixer |
| Sound | Larry Hoki | Sound Recordist |
| Sound | Ron Bartlett | Sound Effects Editor |
| Sound | Owen Langevin | Sound Mixer |
| Sound | Ken S. Polk | Sound Re-Recording Mixer |
| Production | Brian Campbell | Location Manager |
| Crew | Danny Lima | Stunts |
