Guy WilliamsDr. John Robinson June LockhartDr. Maureen Robinson Mark GoddardMajor Don West Marta KristenJudy Robinson Angela CartwrightPenny Robinson Jonathan HarrisDr. Zachary Smith Albert SalmiCaptain Alonzo P. Tucker Michael FoxAlien on Computer Screen (voice) Joe E. TataZalto's Dummy (voice) Gregory MortonJudge Iko (voice) Allan MelvinLittle Joe / Gambling Machine (voice) Tiger Joe MarshSecurity Guard Sue EnglandFemale Robot (voice) William BramleyMr. Nobody Keith TaylorTheodore the bully Henry JonesJeremiah Smith Torin ThatcherThe Space Trader Michael J. PollardThe Boy Wilbur EvansLighted Head Leader Lamar LundyThe Giant Cyclops Warren OatesJimmy Hapgood Robert EastonNewsman Lacy Lyle WaggonerMechanical Man Daniel J. TravantiSpace Hippie Mercedes McCambridgeSybilla Janos ProhaskaBird Monster James WesterfieldDr. Marvello Reta ShawAunt Clara Simms Woodrow ParfreyCol. Silas Fogey Chuck RobersonAlien Fighter Helen KleebPhone Operator Rachel Frank ParkerSecurity Guard Fred CraneAlpha Control Technician Robert 'Big Buck' MaffeiThe Giant Cyclops Charles DierkopHorned Mutant Walter SandeSheriff George Baxendale June ForayGundemar (voice) Bart La RueAlien Machine (voice) Linda Gaye ScottAien Girl Tom AllenInspector (uncredited) Corinna TsopeiPrincess Reyka Byron MorrowGeneral Squires Miriam SchillerMiss Teutonium James MillhollinWilloughby Ollie O'TooleRobotoid (voice) (uncredited) Hal Jon NormanDog-faced Alien (uncredited) Jack Martin SmithArt Direction Walter M. ScottSet Decoration Sven WichmannSet Decoration Robert KinoshitaArt Direction Frank G. CarsonDirector Of Photography Gene PolitoDirector Of Photography Winton C. HochDirector Of Photography Charles G. ClarkeDirector Of Photography Leonard A. EngelSupervising Music Editor Lionel NewmanMusic Supervisor Don HallSupervising Sound Effects Editor Gerald EndlerMechanical Designer L.B. AbbottVisual Effects Johnny BorgeseSpecial Effects Supervisor Howard LydeckerVisual Effects Anthony WilsonStory Editor 
