 Thomas F. WilsonEd Klingbottom | Ed Klingbottom |
 Karim PrinceRoy Dubro | Roy Dubro |
 M. Emmet WalshStanley | Stanley |
 Brion JamesAir Force | Air Force |
 Wigald BoningDr. Strangemeister | Dr. Strangemeister |
 Ben SteinMen in Strangemeister's Head | Men in Strangemeister's Head |
 George KennedyArmy | Army |
 Donna D'ErricoPress Secretary | Press Secretary |
 Barry BostwickPresident Smith | President Smith |
 Rodger HalstonGlaxxon | Glaxxon |
 Don StroudOld Bob | Old Bob |
 John BishopG-Man | G-Man |
 Patricia ElliottGirl Scout Leader | Girl Scout Leader |
 Melissa RiversFemale Reporter #1 | Female Reporter #1 |
 Dave FennoyGlaxxon (voice) | Glaxxon (voice) |
 Dee Bradley BakerSubordinate Alien (voice) | Subordinate Alien (voice) |
 Jennifer CoolidgeNot listed | Not listed |
| CCharles Philip MooreAlien #1 | Alien #1 |
| AAmy KiddFemale Reporter #2 | Female Reporter #2 |
| BBlaine EtcheverryMale Reporter | Male Reporter |
| LLacey Taylor RobbinsGirl Scout | Girl Scout |
 Michael McDonaldSecret Service Agent | Secret Service Agent |
| MManny FernandezNot listed | Not listed |
| PPaul Di FrancoGeneral Pandemonium | General Pandemonium |
 Carlos BernardAlien | Alien |
| RRob KerchnerLifeguard | Lifeguard |
| PPreston AhearnNot listed | Not listed |
 Danny MannAlien #1 (voice) | Alien #1 (voice) |
| SSusan SiloAlien #2 (voice) | Alien #2 (voice) |
 Bobby EdnerNot listed | Not listed |