 | Lance Guest als Alex Rogan |
 | Robert Preston als Centauri |
 | Chris Hebert als Louis Rogan |
| Kay E. Kuter als Enduran |
 | Dan Mason als Lord Kril |
 | Dan O'Herlihy als Grig |
 | Catherine Mary Stewart als Maggie Gordon |
 | Barbara Bosson als Jane Rogan |
 | Norman Snow als Xur |
 | John O'Leary als Rylan Bursar |
 | George McDaniel als Kodan Officer |
 | Charlene Nelson als Rylan Technician |
| John Maio als Friendly Alien |
 | Robert Starr als Underling |
| Al Berry als Rylan Spy |
 | Wil Wheaton als Louis' Friend |
 | Marc Alaimo als Hitchhiker |
| Vernon Washington als Otis |
 | Bunny Summers als Mrs. Boone |
 | Peggy Pope als Elvira |
 | Peter Nelson als Jack Blake |
 | Suzanne Snyder als Cheerleader |
 | Meg Wyllie als Granny Gordon |
| Carroll Timothy O'Meara | Editor |
| Edward O. Denault | Producer |
| Gary Adelson | Producer |
| Craig Safan | Original Music Composer |
| Nick Castle | Director |
| Jonathan R. Betuel | Screenplay |
| King Baggot | Director of Photography |
| Michael Wiegand | Assistant Property Master |
| James D. Bissell | Art Direction |
| Richard Denault | Second Assistant Director |
| Rodney Veto | Best Boy Grip |
| Faye Brenner | Script Supervisor |
| Robert Fletcher | Costume Designer |
| Larry Keys | Best Boy Electrician |
| Robert Inklekofeer | Leadman |
| Barbara Miller | Casting |
| Beverli Eagan | Set Designer |
| John Whitney Jr. | Associate Producer |
| Linda Spheeris | Set Decoration |
| Stephen E. Bridge | Camera Operator |
| Richard J. Beban | Second Assistant Camera |
| Jack Solomon | Production Sound Mixer |
| Roger Gebhard | First Assistant Camera |
| Kim C. Friese | Production Manager |
| Brian E. Frankish | First Assistant Director |
| Fred J. Brown | Supervising Sound Editor |
| George Holmes | Gaffer |
| Charles Hatcher | Dolly Grip |
| William James Teegarden | Set Designer |
| Ron Cobb | Production Designer |
| Tracy Farrington | Property Master |
| Debbie Smith | Production Coordinator |
| Irene Mariano | Casting |
| Al Yaylian | Boom Operator |
| Don High | Set Designer |
| Marlin Hall | Key Grip |
| James Linn | Costumer |
| Wayne R. Campbell | Transportation Captain |
| Michael Lantieri | Special Effects |
| Geoffrey Ryan | Location Manager |
| John L. Jensen | Production Illustrator |
| Richard J. Bayard | Construction Coordinator |
| Ken Johnson | Music Editor |
| David Franco | Music Supervisor |
| Bub Asman | Sound Editor |
| Bill Cresant | Transportation Coordinator |
| Conrad M. Gonzalez | Assistant Editor |
| Michele Sharp | Sound Editor |
| Darrell Pritchett | Special Effects |
| James Camomile | Special Effects |
| Lauren Palmer | ADR Editor |
| Kevin Pike | Special Effects |
| Jeffrey A. Okun | Visual Effects Coordinator |
| Glenn R. Wilder | Stunt Coordinator |
| Daniel J. Johnson | Music Editor |
| Werner Keppler | Makeup Artist |
| Mark Mueller | Songs |
| Claudia Sumner | Visual Effects Supervisor |
