 | Kevin Costner als John James |
 | Ivana Baquero als Louisa James |
 | Gattlin Griffith als Sam James |
 | Samantha Mathis als Cassandra |
 | Noah Taylor als Prof. Evan White |
 | Amanda Garsys als Student |
| Mark Charles Davis als Student |
 | Edmund Entin als BC #2 |
 | Gary Entin als BC #1 |
 | Margaret Anne Florence als Alexis Danella |
 | James Gammon als Roger Wayne |
 | Christopher Harvey als Rick Ross |
 | Sandra Ellis Lafferty als Ms. Arnworth |
| Brynn Massey als Sally |
| James Middleton als Scott |
 | Erik Palladino als Sheriff Ed Lowry |
 | Guy Perry als Alpha Creature |
 | Martin Thompson als Stewart Green |
 | Nevaina Graves Rhodes als Pam |
| Rob Bonz als Adrian |
| John Travis | Screenplay |
| John Connolly | Story |
| Paul Brooks | Producer |
| Guy Danella | Co-Producer |
| Brad Kessell | Co-Producer |
| Don Kurt | Co-Producer |
| Scott Niemeyer | Executive Producer |
| Jonathan Shore | Associate Producer |
| Norm Waitt | Executive Producer |
| Javier Navarrete | Music |
| Checco Varese | Director of Photography |
| Tom Elkins | Editor |
| Robb Sullivan | Editor |
| Jeremy Stewart | Animation |
| Eyde Belasco | Casting |
| Chris Shriver | Production Design |
| Chuck Potter | Set Decoration |
| Dana Campbell | Costume Design |
| Darlene Brumfield | Hair Department Head |
| Dennis Liddiard | Key Makeup Artist |
| Patricia McAlhany Glasser | Key Hair Stylist |
| Francisco X. Pérez | Makeup Department Head |
| Chip Signore | First Assistant Director |
| Jack Ballance | Set Designer |
| James Passanante | Construction Coordinator |
| Brian Campbell | Dialogue Editor |
| Paul Curtis | Supervising Sound Editor |
| Kris Fenske | Sound Designer |
| Ryan Nowak | Sound Effects Editor |
| David Beavis | Special Effects Coordinator |
| Sean Gilhooly | Visual Effects Coordinator |
| Doug Oddy | Visual Effects Supervisor |
| Cal Johnson | Stunt Coordinator |
| Jerome Fauci | Camera Operator |
| Maritza Garcia-Roddy | Costume Supervisor |
| Paul A. Simmons Jr. | Key Costumer |
| Hal Beckett | Supervising Music Editor |
| Meagan Carsience | Music Editor |
| Julie Pearce | Music Editor |
| Liliana M. Molina | Script Supervisor |
| James Wallace | Sound Designer |
| Luiso Berdejo | Director |
