 | Michael Madsen als Press Lenox |
 | Natasha Henstridge als Eve |
 | Marg Helgenberger als Dr. Laura Baker |
 | Mykelti Williamson als Dennis Gamble |
 | George Dzundza als Colonel Burgess |
 | James Cromwell als Senator Ross |
 | Sarah Wynter als Melissa |
 | Justin Lazard als Patrick Ross |
 | Myriam Cyr als Anne Sampas |
 | Baxter Harris als Dr. Orinsky |
| Scott Morgan als Harry Sampas |
 | Nancy La Scala als Debutante |
 | Raquel Gardner als Debutante's Sister |
 | Henderson Forsythe als Pentagon Personnel |
 | Robert Hogan als Pentagon Personnel |
 | Ted Sutton als Pentagon Personnel |
 | Peter Boyle als Dr. Herman Cromwell |
| Gwendolyn Briley-Strand als Biologist |
| Valerie Karasek als Biologist |
| Jane Beard als Biologist |
 | Nancy Young als Tether Console Guard |
| Beau James als Administrator |
 | Tracy Metro als Prostitute |
| Irv Ziff als Seedy Motel Clerk |
| Melanie Bradshaw als Hooker |
| Felicia Deel als Stripper |
| Norman Aronovic als Medical Examiner |
| Kim Adams als Darlene |
| Dustin Turner als Kid at Supermarket |
 | Susan Duvall als Woman Shopper |
| Andreas Kraemer als Male Teenager |
| Lauren Ziemski als Female Teenager |
| Donna Sacco als Woman in Crowd |
 | Sondra Spriggs als Woman with Gamble |
| Kevin Grantz als Federal Agent |
| Zite Bidanie als Press Agent |
| Nat Benchley als Squad Leader |
| Mike Gartland als Cobra Pilot |
| John C. Pratt als Pilot |
| John T. Scanlon als Pilot |
| Herbert R. Schutt Jr. als Pilot |
| Evelyn Ebo als Gorgeous Nurse |
| Bill Boggs als Bill Boggs |
 | Richard Belzer als U. S. President |
| Alesia Newman-Breen als News Announcer |
| Vincent Hammond als Patrick Creature Performer |
 | Monica Staggs als Eve Creature Performer |
| Jason Sweet als Soldier |
| Michael Ahl als Air Force Special Forces |
| Sean Attebury als Soldier |
| Matthew Boylan |
| Heidi Burger als Dinner Guest |
 | Tim Carr als Soldier |
 | Gary Davis als Scientist |
| Frank Faucette als Marine |
| Sean Floyd als Orderly |
| Sarah Fragale als Nurse |
| Byron Henderson als Army Soldier |
| Liam Hughes als Paparazzi |
| Brian Harrison als Bar Patron (uncredited) |
| Julie Mabry als Hooker (uncredited) |
| Karl Otter als FBI agent on boat (uncredited) |
 | Thomas Reid als Maj Gen USMC (uncredited) |
| Eric Alan Wendell als Air Force Special Forces (uncredited) |
| Page Dreher als Store Shopper |
| James Koons als Terrorist |
| Peter Medak | Director |
| Frank Mancuso Jr. | Producer |
| Matthew F. Leonetti | Director of Photography |
| Amanda Mackey | Casting |
| Cathy Sandrich Gelfond | Casting |
| Richard Bruno | Costume Design |
| Miljen Kreka Kljaković | Production Design |
| Mark Zuelzke | Art Direction |
| Suzette Sheets | Set Decoration |
| Laurie Riley | Costume Supervisor |
| Dennis Feldman | Characters |
| Chris Brancato | Writer |
| Dennis Feldman | Executive Producer |
| Jeff Jarvis | Special Effects Coordinator |
| Shane Dixon | Stunt Coordinator |
| James M. Halty | Stunts |
| Jimmy N. Roberts | Stunts |
| Michael Runyard | Stunts |
| Tim Trella | Stunts |
| Jennifer Caputo | Stunts |
| Ray Lykins | Stunts |
| Nancy Young | Stunts |
| Kyle Rudolph | Steadicam Operator |
| Mike Weathers | Rigging Gaffer |
| R. Dana Harlow | Grip |
| Elizabeth Lang | Casting Associate |
| Dennis McNeill | Color Timer |
| Pete Anthony | Orchestrator |
| Brian Heller | Aerial Camera |
| George Dunagan | Assistant Chief Lighting Technician |
| Allen D. Easton | Camera Operator |
| David Insley | Camera Operator |
| Pat Blymyer | Chief Lighting Technician |
| Kyle Rudolph | Second Unit Director of Photography |
| Mark Bolin | Dolly Grip |
| Bob Hall | First Assistant Camera |
| Mark Santoni | First Assistant "B" Camera |
| Lloyd Barcroft | Key Grip |
| Lee Shapira | Key Rigging Grip |
| Thomas E. Whalen | Video Assist Operator |
| Sherri Bramlett | Hairstylist |
| Ron Scott | Key Hair Stylist |
| Perri Sorel | Key Makeup Artist |
| Barbara Lacy | Makeup Artist |
| Richard Snell | Makeup Artist |
| Nancy Garber | Art Department Coordinator |
| Shepherd Frankel | Assistant Art Director |
| A. Charles Carnaggio | Assistant Property Master |
| William 'W' Gilpin | Construction Coordinator |
| Jerrold F. Brooks | Construction Foreman |
| Troy Myers | Leadman |
| Lufeng Qu | Painter |
| Frank Blair | Property Master |
| Maria Baker | Set Designer |
| Gerald Sullivan | Set Designer |
| Colin De Rouin | Set Designer |
| Thomas Hicks Jr. | Set Dresser |
| Eric Lichtfuss | Set Dresser |
| Albert Ford | Set Dresser |
| Elizabeth Weber | Set Dresser |
| Stephen G. Shifflette | Set Dresser |
| Casey Dame | 3D Animator |
| Spencer Knapp | 3D Animator |
| Dan Santoni | 3D Animator |
| Stephen Brand | 3D Supervisor |
| Sebastian Bilbao | 3D Animator |
| Michael Ford | 3D Animator |
| Bryan Grill | Digital Effects Supervisor |
| Wendy Grossberg | Visual Effects Producer |
| Joseph Grossberg | Visual Effects Supervisor |
| Ralph Maiers | Visual Effects Supervisor |
| Christian Carlberg | Animatronics Designer |
| Todd Minobe | Animatronics Designer |
| Brian Poor | Animatronics Designer |
| Clinton Lynch | Animatronics Designer |
| Wendy Schmidt | Animatronics Designer |
| Kerry Gammill | Conceptual Design |
| Ed Shearmur | Music |
| Tod Cooper | Music Consultant |
| Richard Edwards | Music Programmer |
| Reece Gilmore | Music Programmer |
| Dan Garde | Supervising Music Editor |
| Alan Freedman | ADR Mixer |
| Thomas Jones | ADR Supervisor |
| Michael Hertlein | Assistant Sound Editor |
| Tom Hartig | Boom Operator |
| Carol Everson | Cableman |
| Danielle Ghent | Dialogue Editor |
| Bob McNabb | Dialogue Editor |
| Craig Jurkiewicz | Foley Editor |
| Mary Erstad | Foley Mixer |
| Lucy Sustar | Foley Mixer |
| Ossama Khuluki | Foley |
| Diane Marshall | Foley |
| David Lee Fein | Foley |
| Javier Bennassar | Sound Effects Editor |
| Dorian Cheah | Sound Effects Editor |
| Cormac Funge | Sound Effects Editor |
| William Jacobs | Sound Effects Editor |
| Michael Mullane | Sound Effects Editor |
| Elmo Weber | Sound Effects Editor |
| Roland N. Thai | Sound Effects Editor |
| Steve Nelson | Production Sound Mixer |
| John Ross | Sound Re-Recording Mixer |
| Mathew Waters | Sound Re-Recording Mixer |
| Joe Barnett | Sound Re-Recording Mixer |
| Gregory M. Gerlich | Supervising Sound Editor |
| Richard Nord | Editor |
| Peter Mergus | Assistant Editor |
| Mark Rathaus | Assistant Editor |
| Gary Burritt | Negative Cutter |
| Jonathan Chibnall | First Assistant Editor |
| Tim Colletti | First Assistant Editor |
| Joanie Blum | Script Supervisor |
| Eric Fitzgerald | Title Designer |
| Gabriela Gutentag | Unit Publicist |
| Victoria Bruno | Assistant Costume Designer |
| Catharine Fletcher Incaprera | Costumer |
| Heather Hoffman | Costumer |
| Bruce Reik | Costumer |
| Hugo Peña | Key Costumer |
| Pat Moran | Casting |
| Mercedes Kelso | Casting Associate |
| John Strawbridge | Casting Associate |
| David Grant | Dialogue Editor |
| Ken Dufva | Foley Artist |
| David P. Barton | Effects Supervisor |
| Bryan Cooke | Production Assistant |
| Tabby Hanson | Stunts |
| Tom Boyd | Musician |
| Dick Ziker | Stunts |
| Glenn R. Wilder | Stunts |
| Laura Albert | Stunts |
| Mic Rodgers | Second Unit Director |
