 | Katherine Langford als Mara Carlyle |
 | Charlie Plummer als Dylan |
 | Yvonne Orji als Agent Rosetti |
 | Hayley Law als Tess McNulty |
 | Piper Perabo als Angela |
 | Rob Huebel als Charlie |
 | Marlowe Percival als Becky |
 | Laine MacNeil als Jenna Dalton |
 | Clive Holloway als Joe Dalton |
 | Doralynn Mui als Cranberry |
 | Kaitlyn Bernard als Skye |
| Jared Ager-Foster als Jed |
 | Mellany Barros als Katelyn Ogden |
 | Chelah Horsdal als Denise |
 | Luvia Petersen als Dr. Rolanda |
| Jarrett Carlington als Perry |
 | Peter Bundic als Steve |
 | Bzhaun Rhoden als Harper |
| Braeden Shrimpton als Cole |
 | Eva Day als Claire |
 | Darcey Johnson als Liquor Attendant |
 | Dolores Drake als Waitress |
| Francisco Trujillo als Grieving Parent |
| Laura Di Cicco als Grieving Parent #2 |
 | Michael Brian als Investigator #1 |
 | Ash Lee als Investigator |
| Cameron Dent als Gym Teacher |
 | Payton Lepinski als Baby Mara |
 | Melody Nosipho Niemann als Baby Tess |
| Glen Pinchin als Waitress Spouse |
 | Jason Tremblay als Officer |
 | Milo Shandel als Officiant |
| Danielle Kremeniuk als Female Cop |
| Sophia Daly als Baby Katelyn |
 | Paul Moniz de Sa als Katelyn's Dad |
| Kayt Roth als Protestor |
 | Jason Sakaki als Skinny Kid |
| Jeremy Arnold als Hazmat |
 | Brahm Taylor als Hazmat #2 |
 | Amanda Gray als Hazmat Doctor #2 (uncredited) |
 | Junnicia Lagoutin als Student |
| Chris Foss | Co-Producer |
| Jordan Levin | Producer |
| Max Siemers | Executive Producer |
| Nicki Cortese | Producer |
| Pamela J. Keller | Executive In Charge Of Production |
| Aaron Morton | Director of Photography |
| Cheryl Marion | Art Direction |
| Aaron Starmer | Novel |
| Steve Edwards | Editor |
| Sekyiwa Wi-Afedzi | Costume Design |
| Brett Bouttier | Executive Producer |
| Max Scholnick | Co-Producer |
| Brooke Wilcox | Costume Design |
| Matt Kaplan | Producer |
| Scott Levine | Executive Producer |
| Chris August | Production Design |
| Marc Bienstock | Executive Producer |
| Brian Duffield | Producer |
| Melissa Klein | Associate Producer |
| Brian Duffield | Adaptation |
| Don Dunn | Executive Producer |
| Jenny Jue | Casting |
| Brian Duffield | Screenplay |
| Brian Duffield | Director |
| Timothy Montoya | Visual Effects Supervisor |
| Michael Kreple | Supervising Sound Editor |
| Ben Zarai | Sound Designer |
| Becky Ferguson | Stunt Double |
| Heidi Ford | Stunt Double |
| Kory Grim | Stunts |
| Zandara Kennedy | Stunt Driver |
| Jodi Stecyk | Stunt Coordinator |
| Joecy Shepherd | Script Supervisor |
| Aaron Starmer | Executive Producer |
| Matthew Signer | Executive Producer |
| Chris Foss | Line Producer |
| Joseph Trapanese | Music |
| Lindsay Wolfington | Music Supervisor |
| Tracey Nomura | Unit Production Manager |
| Quincy Wheeler | First Assistant Director |
| David Heimbecker | Second Assistant Director |
| Max Scholnick | Associate Producer |
| Bobbi Allyn | Set Decoration |
| Carole Alexander | Assistant Set Decoration |
| Odete Passingham | Set Decorating Coordinator |
| Keely Wood | Lead Set Dresser |
| Christopher Pottruff | Set Dresser |
| Dan Mansell | Set Dresser |
| Linda Giannini | Set Dresser |
| Daryl Stapleton | Set Dresser |
| Donna Smith | Property Master |
| Travis Belyea | Assistant Property Master |
| David Pazdera | Props |
| Joanne Totten | Graphic Designer |
| Meghan Collins | Art Department Coordinator |
| Maxe Roberts | Costumer |
| Sean White | Costumer |
| Danielle White | Costume Set Supervisor |
| Phuong Chau | Truck Supervisor |
| Aaron Morton | Camera Operator |
| Bob Findlay | Camera Operator |
| Harvey LaRocque | Camera Operator |
| Harold Bernard | First Assistant "A" Camera |
| Tim Spencer | First Assistant "B" Camera |
| Jeremy Lundstrom | First Assistant "C" Camera |
| Polly Pierce | Second Assistant Camera |
| Edith Cheng | Second Assistant Camera |
| Kelly McClaughlin | Second Assistant Camera |
| Refah Mahmood | Camera Loader |
| Tracey Chapman | Gaffer |
| Terry Graham | Best Boy Electric |
| Dominador Peralta | Generator Operator |
| Jeff Hall | Rigging Gaffer |
| Vince Phillips | Key Grip |
| Adam Uttley | Best Boy Grip |
| Robert L. O'Hara | Dolly Grip |
| Denis Gutierrez-Ogrinc | Grip |
| Charles Koetke | Grip |
| Gareth Farfan | Rigging Grip |
| Benjamin Gardere | Third Assistant Director |
| Cindy Barlow | Makeup Department Head |
| Nikita L. Pennock | Makeup Artist |
| Brendan Mainusch | Makeup Artist |
| Gerald Gibbons | Hair Department Head |
| Frannie Smith | Hairstylist |
| Cara Doell | Hairstylist |
| Shawn Flynn | Location Manager |
| Mike McAree | Assistant Location Manager |
| Eric Lamontagne | Production Sound Mixer |
| Jarret Read | Boom Operator |
| Ian Robinson | Boom Operator |
| Madison Penland | Sound Assistant |
| Sean Seguin | Production Accountant |
| Cathy Landry | First Assistant Accountant |
| Marianne Sorensen | Payroll Accountant |
| Melyssa Rose | Production Coordinator |
| Audrey Mentz | Assistant Production Coordinator |
| Chrystle Rose | Assistant Production Coordinator |
| Rob Maier | Construction Coordinator |
| Theron Layne | Construction Foreman |
| Thomas Markley | Carpenter |
| Brandon Foxgord | Carpenter |
| Billie-Jo Thomson | Paint Coordinator |
| Thelma Quinn | Scenic Artist |
| Dylan Dowd | Greensman |
| Darren Marcoux | Special Effects Coordinator |
| Brittany A. Jones | Casting Associate |
| Martina Smyth | Casting Associate |
| Megan Bayliss | Casting Assistant |
| Sara Brown | Extras Casting |
| Ron Gavin | Transportation Coordinator |
| Dave Kennedy | Transportation Captain |
| Jessica Bowser Fischer | Post Production Supervisor |
| Jason Troy | Post Production Coordinator |
| Sam Sher | Assistant Editor |
| Judd H. Maslansky | Assistant Editor |
| Ramin Taheri | Assistant Editor |
| Aaron Ruby | Assistant Editor |
| Rafael Baez Jr. | Assistant Editor |
| Scott Pelley | Assistant Editor |
| Jonathan Schultz | Music Editor |
| Dean Menta | Music Editor |
| David Kitchens | Sound Supervisor |
| David Barber | Supervising Sound Editor |
| Michael Kreple | Sound Re-Recording Mixer |
| Michael Kreple | ADR Supervisor |
| David Barber | Dialogue Editor |
| Gonzalo Espinoza | Foley Artist |
| Tim Stipan | Colorist |
| Moises Cruz | Digital Intermediate Producer |
| Chris Van Dyck | Visual Effects Supervisor |
| Michelle Kee | Visual Effects Producer |
| Lauren Aspden | Visual Effects Coordinator |
| Dan Power | Still Photographer |
| Danny Hospes | Stunts |
