 | Blake Webb als David Madison |
 | Tatum Langton als Amy Madison |
 | Jaclyn Hales als Samantha Hayes |
| Keith Hottinger als Sam Mitchell |
| Sue Rowe als Tori Walters |
 | Tye Nelson als Dan |
 | Cuyle Carvin als Brad Klick |
| Richard Sharrah als Matt Hayes |
 | Marlys Miller-Fladeland als Lori Mitchell |
| Nathan Day als Alien / Jill's Groom |
 | Brandyn Cross als Farmer |
 | Caitlin E.J. Meyer als Caitlin |
 | Morgan Mabey als Daughter |
 | Andrew W. Johnson als Sgt. Sebresos |
 | D.L. Walker als Highway Volunteer |
 | Courtnea Hyland als Jill |
 | Kenneth Applegate als Man Outside Tunnel |
 | Dashiell Wolf als Tommy |
 | Cate Allen als Dead Body |
| Jack Diamond als Ryan |
 | Channon Voyce als Hospital Patient |
 | Jason Steadman als Military Advisor |
| Michael Shumway | Director |
| Rick Hansberry | Writer |
| Michael Shumway | Producer |
| Michael Shumway | Music |
| James Schafer | Music |
| Brent Rowland | Director of Photography |
| Michael Shumway | Editor |
| Peter D'Alessio | Casting |
| Mark Toth | Costume Design |
| Troy Benson | Construction Coordinator |
| Chris Hanson | Creature Design |
| Chris Hanson | Special Effects Supervisor |
| Todd Sheridan Perry | Visual Effects Supervisor |
| McCord Larsen | Casting Associate |
| Dawn Strate | Casting Associate |
| Lex Hogan | Script Supervisor |
| Kyle Mallory | Camera Operator |
| Ben Sant | Camera Operator |
| Lowell Oswald | Steadicam Operator |
| Michael Shumway | Steadicam Operator |
| Kyle Jacobson | Still Photographer |
| Henrik Patterson | Gaffer |
| Cameron Rees | Still Photographer |
| Nate Hoffman | Dialogue Editor |
| John Catlin | Foley |
| Joe Haze | Dialogue Editor |
| Owen Peterson | Sound Re-Recording Mixer |
| Joe Haze | Sound Re-Recording Mixer |
| G.W. Pope III | Sound Effects Editor |
| Lauren Searle | Assistant Makeup Artist |
| Sarah Steigers | Assistant Makeup Artist |
| Johnett Robinson | Key Hair Stylist |
| Darren Uram | Key Hair Stylist |
| Lester Lauritzen | Compositor |
| Derek Davidson | Best Boy Electric |
| Mark Toth | Key Costumer |
| Shila Marie McLemore | Wardrobe Assistant |
| Johnett Robinson | Wardrobe Assistant |
| Nancey Ahlstromer | First Assistant Director |
| Mario DeAngelis | First Assistant Director |
| Ryan McDonald | First Assistant Director |
