 Ming-Na WenDr. Aki Ross (voice) | Dr. Aki Ross (voice) |
 Donald SutherlandDr. Sid (voice) | Dr. Sid (voice) |
 Alec BaldwinCap. Gray Edwards (voice) | Cap. Gray Edwards (voice) |
 Ving RhamesSgt. Ryan Whitaker (voice) | Sgt. Ryan Whitaker (voice) |
 Steve BuscemiOff. Neil Fleming (voice) | Off. Neil Fleming (voice) |
 Peri GilpinOff. Jane Proudfoot (voice) | Off. Jane Proudfoot (voice) |
 James WoodsGeneral Hein (voice) | General Hein (voice) |
 Keith DavidCouncil Member (voice) | Council Member (voice) |
 Jean SimmonsCouncil Member (voice) | Council Member (voice) |
 Matt McKenzieMajor Elliot (voice) | Major Elliot (voice) |
 John DeMitaBCR Soldier #1 / Space Station Technician #2 / Additional Voices (voice) | BCR Soldier #1 / Space Station Technician #2 / Additional Voices (voice) |
 Matt AdlerAdditional Voices (voice) | Additional Voices (voice) |
 Steve AltermanAdditional Voices (voice) | Additional Voices (voice) |
 David ArnottAdditional Voices (voice) | Additional Voices (voice) |
 Cathy CavadiniAdditional Voices (voice) | Additional Voices (voice) |
 Lanei ChapmanAdditional Voices (voice) | Additional Voices (voice) |
 Vicki DavisAdditional Voices (voice) | Additional Voices (voice) |
 Judi DurandAdditional Voices (voice) | Additional Voices (voice) |
 Greg FinleyAdditional Voices (voice) | Additional Voices (voice) |
 Jack FletcherAdditional Voices (voice) | Additional Voices (voice) |
 Julia FletcherAdditional Voices (voice) | Additional Voices (voice) |
 Barbara HarrisAdditional Voices (voice) | Additional Voices (voice) |
 David McCharenAdditional Voices (voice) | Additional Voices (voice) |
 Tracy MetroAdditional Voices (voice) | Additional Voices (voice) |
 David MichieAdditional Voices (voice) | Additional Voices (voice) |
 Richard PennAdditional Voices (voice) | Additional Voices (voice) |
| DDavid J. RandolphAdditional Voices (voice) | Additional Voices (voice) |
 Andrea BakerAdditional Voices (voice) | Additional Voices (voice) |
 Eric AtenDeep Eyes (uncredited) | Deep Eyes (uncredited) |
 John DiMaggioBFW Soldier #1 (voice) (uncredited) | BFW Soldier #1 (voice) (uncredited) |
