 | Val Kilmer als Chris Knight |
 | Gabriel Jarret als Mitch Taylor |
 | Michelle Meyrink als Jordan |
 | William Atherton als Professor Hathaway |
 | Robert Prescott als Kent |
 | Louis Giambalvo als Major Carnagle |
 | Jon Gries als Lazlo Hollyfeld |
 | Ed Lauter als CIA Man Decker |
 | Stacy Peralta als Shuttle Pilot |
 | Daniel Ades als Laser Ray Victim |
 | Andres Aybar als Bartender |
| Charles Shull als Air Force General |
 | Beau Billingslea als George |
| Charles Parks als Larry |
 | Sean Frye als Boy at Science Fair |
 | JoAnn Willette als Girl at Science Fair |
| Ina Gould als Old Lady |
| Nadine Vix als Student at Science Fair |
| Paul Tulley als Mr. Taylor |
 | Joanne Baron als Mrs. Taylor |
 | Harry Johnson als Darlington Recruiter |
 | Patti D'Arbanville als Sherry Nugil |
 | Monte Landis als Dr. Dodd |
 | Sandy Martin als Mrs. Meredith |
 | Severn Darden als Dr. Meredith |
 | Randy Lowell als Cornell |
| John Shepherd Reid als Carter |
 | Tommy Swerdlow als Bodie |
| Mark Kamiyama als 'Ick' Ikagami |
| Martin Gundersen als Math Professor |
| Brett Miller als Carpet Man |
 | Dean Devlin als Milton |
 | Yuji Okumoto als Fenton |
 | Lynda Wiesmeier als Chris' Girl at Party |
 | Penny Baker als Ick's Girl at Party |
 | Marcia Karr als Cornell's Girl at Party |
| Isabelle Walker als Girl at Party |
| Marii Mak als Girl at Party |
| Cheri Wells als Girl at Party |
| Catherine MacNamara als Girl at Party |
| Johnny Vasily als Student |
| Ed Garrabrandt als TV Makeup Man |
 | Isabel Cooley als TV Stage Manager |
| Robin Stober als Waitress |
 | Deborah Foreman als Susan |
| David Marvit als Student in Hall |
 | Michael Crabtree als Air Force Gate Guard |
| Charles Sweigart als Air Force Gate Guard |
 | Peter Parros als Air Force Gate Guard |
| Ronald Taylor als Computer Technician |
| James Carrington als Air Force Major |
| Michael Backes als Air Force Controller |
| Corki Grazer als Air Force Sergeant |
 | Jeanne Mori als Laser Technician |
 | David Ursin als Engineer |
| Joe Dorsey als Congressman |
| Will Knox als Laser Specialist |
| Kevin Hurley als Air Force Technician |
 | Kimberly Spak als Girl in Popcorn (uncredited) |
| Pat Proft | Story |
| Phil Abramson | Set Decoration |
| Edie Panda | Hairstylist |
| Thomas Newman | Original Music Composer |
| Zoltan Elek | Makeup Artist |
| John J. Connor | Camera Operator |
| Jane Jenkins | Casting |
| Martha Coolidge | Director |
| Phil Cory | Special Effects Coordinator |
| Robert Daley | Executive Producer |
| Brian Grazer | Producer |
| Neal Israel | Screenplay |
| Pat Proft | Screenplay |
| Jack G. Taylor Jr. | Art Direction |
| Neal Israel | Story |
| Janet Hirshenson | Casting |
| Richard Chew | Editor |
| Josan F. Russo | Production Design |
| Richard L. Bennett | Visual Effects Supervisor |
| Vilmos Zsigmond | Director of Photography |
| PJ Torokvei | Screenplay |
| Sam Crespi-Horowitz | Associate Producer |
| Becky Mancuso-Winding | Music Supervisor |
| Michael Papale | Music Supervisor |
| Julia Evershade | Supervising Sound Editor |
| George Budd | Sound Designer |
| Ted Whitfield | Music Editor |
| Marla Denise Schlom | Costume Supervisor |
| Joseph Roveto | Costumer |
| Michael F. Hamer | Costumer |
| David Stipes | Visual Effects Supervisor |
| Kenny Alexander | Stunts |
| Shane Dixon | Stunts |
| Kenny Ferrugiaro | Stunts |
| Linda Lee Franklin | Stunts |
| Allan Graf | Stunts |
| Marian Green | Stunts |
| Debby Porter | Stunts |
| Bernie Pock | Stunts |
| Spiro Razatos | Stunts |
| Edward J. Ulrich | Stunts |
| David M. Graves | Stunts |
| Billy Ray Smith | Unit Production Manager |
| Stephen McEveety | First Assistant Director |
| Joseph P. Moore | Second Assistant Director |
| Erin M. Cummings | Set Designer |
| Steven Wolff | Set Designer |
| Alex Tavoularis | Other |
| Ken Nishino | First Assistant Camera |
| Robert Samuels | Second Assistant Camera |
| Frederick Elmes | Second Unit Director of Photography |
| Richard W. Deats | Key Grip |
| Jerry D. Deats | Grip |
| Robert Jason | Best Boy Electric |
| Arthur Coburn | Additional Editing |
| Albert Coleman | First Assistant Editor |
| Alexandra Leviloff | Other |
| Deborah Cichocki | Other |
| Bill Wilner | Other |
| Anna Boorstin | Sound Editor |
| Virginia Cook-McGowan | Sound Editor |
| Cari Lewis | Sound Editor |
| Marshall Winn | Sound Editor |
| Roxanne Jones McCarthy | Sound Editor |
| Beth Bergeron | Supervising ADR Editor |
| Lauren Palmer | ADR Editor |
| Paul C. Warschilka | Assistant Sound Editor |
| Christy Richmond | Assistant Sound Editor |
| John P. Fasal | Sound Effects |
| Doug Hemphill | Sound Effects |
| Carlton Kaller | Other |
| John Roesch | Foley Artist |
| Ellen Heuer | Foley Artist |
| Gary A. Hecker | Foley Artist |
| John T. Reitz | Sound Re-Recording Mixer |
| Barbara Harris | ADR Voice Casting |
| David E. Campbell | Sound Re-Recording Mixer |
| Gregg Rudloff | Sound Re-Recording Mixer |
| C. Darin Knight | Sound Mixer |
| Elliot Lurie | Music Coordinator |
| John Vigran | Music Consultant |
| Donald L. Bolger | Boom Operator |
| Charles J. Bond | Cableman |
| Terry E. Lewis | Property Master |
| Sandra Renfroe | Assistant Property Master |
| David L. Glazer | Assistant Property Master |
| James Husbands | Leadman |
| Mark S. Taylor | Set Dresser |
| Joanie Blum | Script Supervisor |
| Mike Schilz | Second Second Assistant Director |
| Marcia Reed | Still Photographer |
| Jan Walker | Producer's Assistant |
