 | Roy Dupuis als John Strauss |
 | Kristin Lehman als Kathleen Strauss |
 | Rutger Hauer als Dr. Marlowe |
 | Leni Parker als Baby Laura |
 | John Dunn-Hill als Hank Gordon |
 | Joanna Noyes als Byrde Gordon |
 | Janine Theriault als Alice Gordon |
| Pascal Gruselle als Vermeer |
 | Jackie Burroughs als Lexie |
 | Felicia Shulman als Yolanda |
| Michelle Brunet als Ramona |
| John Harold Cail als Ferryman |
| David Deveau als Ben |
| Spencer Evans als Squeakie |
 | Carmen Ferland als Mrs. Shea |
 | Lisa Bronwyn Moore als Toot |
 | Christopher Heyerdahl als Narrator (voice) |
 | Gillian Ferrabee als John's Twin Sister |
| Robert Baril als The Van Daams |
| André Dandurand als The Van Daams |
| Denis Lapalme als The Van Daams |
| Matthieu Parent als The Van Daams |
| Gary Jewell als The Van Daams |
| Peter Svatek | Director |
| Charles Adair | Writer |
| Dan O'Bannon | Writer |
| H.P. Lovecraft | Novel |
| Ronald Shusett | Writer |
| John Buchanan | Executive Producer |
| Michel Proulx | Production Design |
| Barry Gravelle | Director of Photography |
| Julie Allan | Producer |
| Alan Reeves | Original Music Composer |
| Ed Elbert | Executive Producer |
| Heidi Haines | Editor |
| Gary Howsam | Executive Producer |
| Pieter Kroonenburg | Producer |
| Hélène Boulay | Line Producer |
| H.P. Lovecraft | Writer |
| Vera Miller | Casting |
| Gary Evans | Post Production Supervisor |
| René Casavant | Sculptor |
| Simon Pressey | Foley Recordist |
| Stéphane Lestage | Editorial Services |
| Frédéric Lefebvre | Electrician |
| Sylvain Arseneault | Boom Operator |
| Adrien Morot | Special Effects Makeup Artist |
| Francis Choquette | Special Effects Technician |
| Claude Fortier | Electrician |
| Laurie Plamondon | Thanks |
| Hélène Boulay | Production Manager |
| Richard Bélanger | Post Production Supervisor |
| Sylvie Dufour | Location Scout |
| Francine Grenon-Leduc | Seamstress |
| Denis-Noël Mostert | Steadicam Operator |
| Jean Levasseur | Electrician |
| Nadia Rona | Casting |
| Erick Herbert | Special Effects Technician |
| Michelle Côté | Hairstylist |
| Claire Alary | Property Buyer |
| Phil Reznick | Sound Editor |
| Pierre Côté | Special Effects Technician |
| Suzanne Chiasson | Script Supervisor |
| Benoit Falardeau | Location Scout |
| Ronny Gosselin | Animatronics Designer |
| Steeve Henry | Property Master |
| Louis Marion | Sound Recordist |
| Pierre L'Heureux | Special Effects Technician |
| Pierre Guérin | Editorial Staff |
| Marc Simpson-Threlford | Camera Trainee |
| Conrad Roy | Best Boy Grip |
| Paul Cunningham | Electrician |
| Daniel Bouthillette | Third Assistant Director |
| Philippe Espantoso | Sound Re-Recording Mixer |
| Glenn Tussman | Sound Editor |
| André Vincelli | Dialogue Editor |
| André Laperrière | Special Effects Technician |
| Thomas Metzger | Colorist |
| Pantazidis Panagiotis | Still Photographer |
| Georges Archambault | Assistant Camera |
| Robert Vienneau | Key Hair Stylist |
| Pascal Dufaux | Sculptor |
| Carl Lessard | Graphic Designer |
| C.J. Goldman | Creature Design |
| Mike Gunther | Stunts |
| Peter Measroch | Music Editor |
| Roch Boucher | Second Assistant Camera |
| Jacques Girard | Key Grip |
| Martin Lussier | Thanks |
| Luc Campeau | First Assistant Director |
| Alain Giguère | Painter |
| Arun Majumdar | Sound |
| Éric Lagacé | Foley Artist |
| Chantal Ladouceur | Seamstress |
| Alice Mayeux | Seamstress |
| Annie Carignan | Stunts |
| David McKeown | Stunt Coordinator |
| Lothar Bahr | First Assistant Camera |
| David McKeown | Stunts |
| Michel Proulx | Color Timer |
| Louis-Martin Paradis | Assistant Editor |
| Julie Bouffard | Assistant Editor |
| Linda Rona | Extras Casting |
| Michael Yaremchuk | Second Assistant Camera |
| Sylvie Gaumond | Thanks |
| Véronique Pagnoux | Painter |
| Daniel Svatek | Storyboard Artist |
| Peter Harper | Sound Re-Recording Mixer |
| Thierry Craig | Special Effects Technician |
| André Laforest | Special Effects Technician |
| Marcel Cloutier | Location Manager |
| Philippe Prud'homme | First Assistant Camera |
| Ryan Nicholson | Special Effects Makeup Artist |
| Gigi Cretier | Second Assistant Director |
| Rejean Brochu | Construction Manager |
| Jocelyn Tremblay | Property Buyer |
| Richard Betanzos | Supervising Sound Editor |
| Scott Donald | Dialogue Editor |
| Steven Gurman | Supervising Dialogue Editor |
| Virginia Storey | Foley Artist |
| Gina Duhamel | Stunts |
| Mireille Samson | Stunts |
| Jérôme Tiberghien | Stunts |
| Boris Roy | First Assistant Camera |
| Pierre Malouin | Grip |
| Henri Khouzam | Key Makeup Artist |
| Adrien Morot | Creature Design |
| Marie-Andrée Paquet | Second Assistant Camera |
| Luc Leblanc | Electrician |
| Rosina Bucci | Casting |
| Isabelle Guay | Art Direction |
| Tom Lane | Special Effects Technician |
| Pierre 'Bill' Rivard | Special Effects Coordinator |
| Thomas Fries | Editorial Consultant |
| Michel Larrivée | Thanks |
| Claire Nadon | Costume Design |
| Dominic St-Jean | Unit Manager |
| Lison Daigneault | Set Dresser |
| Cory Rizos | Sound Editor |
| Jérôme Tiberghien | Stunt Coordinator |
| Jacques Girard | Assistant Camera |
| Ginette Paré | Set Decoration |
| Manon Parisien | Assistant Makeup Artist |
| Donald Tetreault | Unit Manager |
| Marie-Claude L'Heureux | Art Department Coordinator |
| Jacques Langlois | Special Effects Technician |
| Eric-André Paquin | Special Effects |
| Christian Gravel | Assistant Editor |
| Philippe Martel | Second Assistant Camera |
| Marco Venditto | Electrician |
| Eric Babinec | Grip |
