Four interwoven stories that occur on Halloween: an everyday high school principal has a secret life as a serial killer; a college virgin might have just met the one guy for her; a group of teenagers pull a mean prank, and a bitter old recluse receives an uninvited guest.
| Directing | Michael Dougherty | Director |
| Production | Michael Dougherty | Executive Producer |
| Production | Bryan Singer | Producer |
| Sound | Douglas Pipes | Original Music Composer |
| Production | William Fay | Executive Producer |
| Production | Alex Garcia | Executive Producer |
| Production | Dan Harris | Executive Producer |
| Production | Jon Jashni | Executive Producer |
| Editing | Robert Ivison | Editor |
| Production | Sean Cossey | Casting |
| Production | Matthew Lessall | Casting |
| Production | Roger Mussenden | Casting |
| Costume & Make-Up | Trish Keating | Costume Design |
| Writing | Michael Dougherty | Screenplay |
| Production | Stuart Aikins | Casting |
| Art | Mark S. Freeborn | Production Design |
| Art | Tony Wohlgemuth | Art Direction |
| Art | Rose Marie McSherry | Set Decoration |
| Crew | James Bamford | Stunts |
| Camera | Glen MacPherson | Director of Photography |
| Costume & Make-Up | Connie Parker | Makeup Department Head |
| Costume & Make-Up | Sanna Seppanen | Key Hair Stylist |
| Costume & Make-Up | Bill Terezakis | Makeup Effects Designer |
| Art | Wes Harmer | Art Department Coordinator |
| Art | Mike Rennison | Construction Coordinator |
| Art | Don Buchanan | Property Master |
| Crew | Dan Keeler | Special Effects Coordinator |
| Crew | Bob Comer | Special Effects Coordinator |
| Visual Effects | Wes Sargent | Lead Animator |
| Visual Effects | Rod Bland | Animation |
| Visual Effects | Joe Margetson | Visual Effects Coordinator |
| Visual Effects | Steve Won | Visual Effects Coordinator |
| Visual Effects | Jennifer Middleton | Visual Effects Coordinator |
| Crew | Shelley Maclean | Visual Effects Editor |
| Visual Effects | Chris Anderson | Visual Effects Producer |
| Visual Effects | David Sanger | Visual Effects Producer |
| Visual Effects | Charlene Eberle Douglas | Visual Effects Supervisor |
| Visual Effects | Matthew Gratzner | Visual Effects Supervisor |
| Camera | Greg Fox | Camera Operator |
| Camera | David Crone | Steadicam Operator |
| Camera | Joseph Lederer | Still Photographer |
| Camera | Glen A. Dickson | Additional Camera |
| Lighting | Paul Tran | Gaffer |
| Lighting | Dennis Jones | Rigging Gaffer |
| Lighting | Dean Collins | Rigging Grip |
| Camera | Tim Milligan | Dolly Grip |
| Camera | Fraser Boyle | Key Grip |
| Lighting | Stephen Jackson | Chief Lighting Technician |
| Crew | Christy Beckert | Title Graphics |
| Crew | August Coleman | Title Graphics |
| Production | Elisa Bayley | Casting Associate |
| Production | Kate Caldwell | Casting Associate |
| Costume & Make-Up | Gail Barrett | Assistant Costume Designer |
| Editing | Jill Bogdanowicz | Digital Intermediate |
| Editing | Gregg Schaublin | Digital Intermediate |
| Editing | Cheryl Buckman | First Assistant Editor |
| Editing | Jason Dale | First Assistant Editor |
| Editing | Crispin Struthers | First Assistant Editor |
| Editing | Shelly Theaker | Assistant Editor |
| Sound | Oliver Hug | Music Editor |
| Sound | Andrew Ries | Music Editor |
| Crew | Dana Dubé | Animal Wrangler |
| Directing | Tracy Young | Script Supervisor |
| Crew | Zarah Chun | Craft Service |
| Sound | Tony Wyman | Boom Operator |
| Sound | Brian Campbell | Dialogue Editor |
| Sound | Brian Campbell | Supervising ADR Editor |
| Sound | Shane Shemko | Foley |
| Sound | Cam Wagner | Foley |
| Sound | Dario DiSanto | Foley Editor |
| Sound | Kris Fenske | Sound Designer |
| Sound | David Scott | Sound Effects Editor |
| Sound | James Wallace | Sound Effects Editor |
| Sound | Ian Robinson | Sound Engineer |
| Sound | Jason Oliver | Sound Recordist |
| Sound | Graeme Hughes | Sound Re-Recording Mixer |
| Sound | Iain Pattison | Sound Re-Recording Mixer |
| Sound | Paul A. Sharpe | Sound Re-Recording Mixer |
| Sound | Anke Bakker | Supervising Sound Editor |
| Production | Thomas Tull | Executive Producer |
| Art | Adam Catt | Set Dresser |
| Art | Shannon Gottlieb | Assistant Set Decoration |
| Art | David Hadaway | Set Designer |
| Art | Leah Wiebe | Set Dresser |
| Art | James Steuart | Assistant Art Director |
| Production | Ashok Amritraj | Executive Producer |
| Art | Fabian Jonathan | Art Direction |
| Crew | Melissa R. Stubbs | Stunts |
| Crew | Suzi Stingl | Stunts |
| Directing | Cindy Smith | Second Assistant Director |
| Directing | Pete Whyte | First Assistant Director |
| Crew | Carolyn Anderson | Stunts |
| Visual Effects | Patrick Tatopoulos | Creature Design |
