| John Stockwell | Michael Harlan |
| Fisher Stevens | Vince Latello |
| Raphael Sbarge | Sherman |
| Dennis Hopper | Bob Roberts |
| Barry Corbin | Lew Harlan |
| Ann Wedgeworth | Dolores |
| Richard Masur | Detective Isadore Nulty |
| Danielle von Zerneck | Ellie Sawyer |
| Candace Silvers | Irene |
| Beau Dremann | Matusky |
| Pat Simmons | Crystal |
| John Vidor | Jock No. 1 |
| Vincent Barbour | Jock No. 2 |
| Jaime Alba | Jock No. 3 |
| Robert Beer | Dwight D. Eisenhower |
| Cameron Young | General's Aide |
| Noel Conlon | Secret Service Agent |
| Jackson Bostwick | Sentry |
| Elven Havard | Fireman |
| Linda Hoy | Librarian |
| Robin Allyn | Ellie's Friend |
| Michael Berryman | Mutant No. 1 |
| Chuck Hemingway | Coy |
| Pamela Springsteen | Hall Monitor, Ellie's Friend |
| Matt Hoelscher | Preppie |
| Jack O'Leary | Sentry at Air Force Guardhouse |
| Clare Peck | Policewoman |
| Joel Harrison | Wino |
| Ann Culotta | Trucker's Wife |
| Hank Calia | Neanderthal Man |
| Scott Bailey Spangler | Guard No. 2 at Air Force Guardhouse |
| Frank Welker | Alien Voices |
| John Carter | General |
| Robert DoQui | Desk Sergeant |
Technical Credits
| Jonathan Betuel | Director,Screenwriter |
| Peter Bernstein | Score Composer |
| Michael Colina | Songwriter |
| Nick Gilder | Songwriter |
| Jeff Gordon | Songwriter |
| Bob Held | Songwriter |
| Bill Heller | Songwriter |
| Matthew Hill | Songwriter |
| Betsy Jones | Costumes/Costume Designer |
| Holly Knight | Songwriter |
| John Mansbridge | Art Director |
| Joe McDonald | Songwriter |
| C. Timothy O'Meara | Editor |
| John Scheele | Special Effects |
| Robert J. Schiffer | Makeup |
| Bill Shepard | Casting |
| David Snyder | Production Designer |
| Jonathan Taplin | Producer |
| David M. Walsh | Cinematographer |
| Jerry Wunderlich | Set Decoration/Design |