| Chris Knight | 方·基默
 | |
| Mitch Taylor (as Gabe Jarret) | Gabriel Jarret
 | |
| Jordan Cochran | Michelle Meyrink | |
| Prof. Jerry Hathaway | 威廉·阿瑟东
 | |
| Lazlo Hollyfeld (as Jonathan Gries) | 强·格瑞斯
 | |
| Sherry Nugil | Patti D'Arbanville | |
| Shuttle Pilot | 斯泰西·佩拉塔
 | |
| Laser Ray Victim | Daniel Ades | |
| Bartender | Andres Aybar | |
| Maj. Carnagle | Louis Giambalvo | |
| David Decker | 艾德·劳特
 | |
| Air Force General | Charles Shull | |
| George | Beau Billingslea | |
| Larry | Charles Parks | |
| Boy at Science Fair | Sean Frye | |
| Girl at Science Fair | JoAnn Willette | |
| Old Lady | Ina Gould | |
| Student at Science Fair | Nadine Vix | |
| Mr. Taylor | Paul Tulley | |
| Mrs. Taylor | 乔安妮·巴伦
 | |
| Darlington Recruiter | Chip Johnson | |
| Dr. Dodd | Monte Landis | |
| Mrs. Meredith | Sandy Martin | |
| Dr. Meredith | 赛文·达尔登
 | |
| Cornell (as Randolph Dreyfuss) | Randy Lowell | |
| Kent Torokvei | 罗伯特·普雷斯科特
 | |
| Carter | John Shepherd Reid | |
| Bodie (as Tom Swerdlow) | Tommy Swerdlow | |
| 'Ick' Ikagami | Mark Kamiyama | |
| Math Professor | Martin Gundersen | |
| Carpet Man | Brett Miller | |
| Milton | 迪安·德夫林
 | |
| Fenton | Yuji Okumoto | |
| Chris' Girl at Party | Lynda Wiesmeier | |
| Ick's Girl at Party | Penny Baker | |
