Barbara BainHelena Russell Zienia MertonSandra Benes Anton PhillipsDr. Mathias Barry MorseVictor Bergman Tony AnholtTony Verdeschi Prentis HancockPaul Morrow Alan HarrisMain Mission Operative (uncredited) Jeffery KissoonBen Vincent Harry FielderMedic (uncredited) Vincenzo FiorilloEagle Pilot (voice) Robert PhillipsMain Mission Operative (uncredited) Stuart DamonGuido Verdeschi Alf JointSteiner (uncredited) Laurie DavisMain Mission Operative (uncredited) Laurence HarringtonStewart Nicholas YoungPeter Rockwell Billy J. MitchellProfessor Hunter Jeremy YoungJack Bartlett Roy DotriceGerald Simmons Judy GeesonRegina Kesslan Bernard CribbinsCaptain Michael Marc ZuberSecurity Lieutenant Gareth HuntEagle Pilot (uncredited) Freddie JonesCharles Logan Michael CulverPete Irving Philip MadocCommander Gorski Geoffrey BayldonNumber Eight Valerie Van OstMain Mission Operative Don FellowsGTV Newscaster Martha NairnFemale Operative Richard JohnsonLee Russell Christopher LeeCaptain Zandor Carolyn CouragePrima ragazza Claire LutterMain Mission Operative (uncredited) Andy SutcliffeMain Mission Operative (uncredited) Andy DempseyMain Mission Operative (uncredited) Maggie WrightMain Mission Operative (uncredited) Carla RomanelliMelita Kelly Lawrence TrimbleSteve Abrams Orso Maria GuerriniLuke Ferro Barbara KellermanMonique Bouchere Michael SheardDarwin King Susan JamesonJuliet Mackie Aubrey MorrisPetros High Priest Douglas WilmerCommissioner Dixon Anthony ValentineMale Alien Roy ScammellJim Nordstrom Jan HarveyAlpha News Service Girl Anthony NichollsJames Warren Anouska HempelAnnette Fraser Michael Sharvell-MartinBrian the Robot Veronica LangLyra / Maurna Terry WalshRescue Eagle Pilot Godfrey JamesAlien Transporter David JacksonAlien Strong Rita WebbSlatternly Woman Robert RiettiSphere (voice) James LaurensonPatrick Osgood Pamela StephensonMichelle Osgood Lloyd McGuireFirst Engineer Brendan PriceSecurity Guard Nova LlewellynAlphan Woman Lynne FrederickShermeen Williams Nicholas CampbellEddie Collins David ProwseCloud Creature Deborah FallenderCarolyn Powell Anthony StambouliehGeorge Crato Michael WalkerCarl Renton Gregory de PolnayPeter Garforth Frank WattsRegista / Director Of Photography Johnny ByrneSceneggiatore Christopher PenfoldSceneggiatore Anthony TerpiloffSceneggiatore Donald JamesSceneggiatore Fred FreibergerSceneggiatore / Produttore Edward di LorenzoSceneggiatore Terence FeelySceneggiatore Elizabeth BarrowsSceneggiatura John GoldsmithSceneggiatore Terrance DicksSceneggiatore George BellakSceneggiatore Michael WinderSceneggiatore Jesse Lasky Jr.Sceneggiatura Philip BakerSceneggiatore Tony BarwickSceneggiatore Sylvia AndersonProduttore Brendan J. StaffordDirector Of Photography David LaneSecond Unit Director Derek WadsworthCompositore Musicale Originale Barry GrayCompositore Musicale Originale Ron FryResponsabile di Produzione Brian JohnsonVisual Effects Director 
