 | Kiefer O'Reilly als Howard Lovecraft / Davik (voice) |
 | Michelle O'Reilly als Sarah Lovecraft (voice) |
 | Christopher Plummer als Dr. West (voice) |
 | Tyler Nicol als Winfield Lovecraft (voice) |
 | Alison Wandzura als Mary Lovecraft (voice) |
| Sean Patrick O'Reilly als Spot (voice) |
| Summer O'Reilly als Gotha (voice) |
| Phoenix O'Reilly als Twi'i (voice) |
| Harmony O'Reilly als Innes (voice) |
| Scott McNeil als Ice Govlin 'Barry' / Govlins (voice) |
 | Jane Curtin als Algid Bunk (voice) |
 | Doug Bradley als The Envoy (Nyarlathotep) (voice) |
 | Ron Perlman als Shoggoth (voice) |
| H.P. Lovecraft | Writer |
| Sean Patrick O'Reilly | Director |
| Sean Patrick O'Reilly | Producer |
| Sean Patrick O'Reilly | Writer |
| Kelly Cole | Supervising Sound Editor |
| Kevin Belen | Sound Mixer |
| Kevin Belen | Sound Effects Editor |
| Kevin Belen | Foley Artist |
| Bill Mellow | Supervising Sound Editor |
| Bill Mellow | Sound Effects Designer |
| Brad Gilmore | Casting |
| Rob Neilson | Colorist |
| Ryan Bozajian | Visual Effects Design Consultant |
| Todd Demong | Storyboard Artist |
| Brendan Hansell | Editor |
| Tyler Nicol | Associate Producer |
| Tyler Nicol | Storyboard Artist |
| Michelle O'Reilly | Producer |
| David Green | Sound Mixer |
| David Green | Sound Effects Editor |
| Chris Trinh | Animation |
| Frank Poon | Animation |
| David Edinger | Thanks |
| Mark Angly | Sound Designer |
| Bruce Brown | Writer |
| George Streicher | Music |
| Eric Kupp | Sound Editor |
| Gary Yuen | Art Direction |
| Dwight MacPherson | Writer |
| Billy Zhao | Animation |
| Andrew Osano | Musician |
| Josh Plotner | Musician |
| Renzo Podesta | Writer |
| Warren Fergus | Executive Producer |
| Chris Uminga | Storyboard Artist |
| Kelly Cole | Sound Designer |
| Thai Long Ly | ADR Recordist |
| Rodolfo Piedras | Foley Artist |
| Haqui Gbadamosi | Animation |
| Haqui Gbadamosi | CG Supervisor |
| Chris Hogstead | Rigging Supervisor |
| Jim Su | Rigging Supervisor |
| Kaushik Swain | Visual Effects Supervisor |
| Martin Bastian | Animation |
| Kodee Burton | Animation |
| Fransisco Camacho | Animation |
| Mac Cashman | Animation |
| Nancy Dhillon | Animation |
| Ramon Gamez-Castillo | Animation |
| Mitchell Ludford | Animation |
| Kevin Thorpe | Animation |
| Justin Bell | Score Engineer |
| Christopher Bill | Musician |
| Candy Emberley | Musician |
| Richard Heacock | Musician |
| Remington Roberts | Musician |
| Paul Websdale | Thanks |
