Ivan DixonSgt. James Conover Robert DuvallAdam Ballard Willard SageChief of Staff Jason WingreenBill Turner Edward PlattDean Radcliffe Douglas HendersonDetective Lt. Runyan Ted de CorsiaRandolph E. Branch Dabney ColemanDr. Williams Philip AbbottLincoln Russell David FrankhamHarvey Kry Jr. Martin LandauRichard Bellero Geraldine BrooksAnn Barton William DouglasGalaxy Being (as Wm. O. Douglas) Sally KellermanJudith Bellero David McCallumTone Hobart Allyson AmesArndis Pollard Neil HamiltonHilary J. Clarke Henry ScottFBI Agent Marshall Peter Mark RichmanProf. Ian Fraser James ShigetaAIO Captain Newa Jacqueline ScottDr. Alicia Hendrix George MacreadyDr. Marshall Shirley O'HaraDr. Soldini Peter MadsenCarter - Watchman Tim O'ConnorPaul Tanner / Voice in The Enemy's war helmet (voice) Konstantin ShayneThe Gardener Vaughn TaylorRandall Latimer Crahan DentonDr. Matthew James Leonard NimoyJudson Ellis Curt ConwayDr. Philip Mendl Bob JohnsonProject Adonis Intercom Announcer (voice) (uncredited) Dee PollockFrancis Hadley, P.F.C. James FrawleyRobert Renaldo Lee PhilipsRadio DJ Gene 'Buddy' Maxwell Alan BaxterColonel Grover Olive DeeringLisa Lawrence BarBara LunaGaby Christian Diana SandsDr. Julia Harrison Salome JensLaurie Cameron Patrick O'NealJonathan Meridith Burt MetcalfeEddie Phillips Billy Green BushTom - Duckhunter #3 (as William Bush) Donald PleasenceHarold J. Finley Edward MulhareProfessor Mathers Ron RandellHenderson James Shirley KnightNoelle Anderson Ed AsnerDetective Sgt. Thomas Siroleo Michael TolanProf. Stephen Grave Grace Lee WhitneyCarla Duveen Larry PennellDr. Evan Marshall Geoffrey HorneWade Norton John AndersonEbonite Interrogator Howard Da SilvaThurman Cutler (as Howard da Silva) William ShatnerGen. Jeff Barton Leslie StevensElection Returns Commentator (voice) (uncredited) / 导演 / 编剧 / 执行制片人 Leonard StoneDr. Phillip Gainer John MarleyDr. Sigmund Hindeman Gary MerrillDr. James Hamilton / Major Roger Brothers Francis De SalesPrison Warden (as Francis de Sales) Russell CollinsJustice of the Peace Ruth RomanProf. Diana Brice Sam WanamakerDr. Simon Holm Michael ForestProf. Stuart Peters Martin SheenPvt. Arthur Dix Peter Lind HayesDr. James Stone Michael ConstantineJoe Dix Peggy Ann GarnerAmanda Frank Paul LambertDr. Henschell Peter BreckSenator Orville Harry GuardinoMajor Roger Brothers / Dr. James Hamilton Melinda CaseyVivia Balfour Hayden Michael HigginsDr. Thomas Kellander William BoyettCo-Pilot Beeman Cliff RobertsonAlan Maxwell Harry TownesClifford Scott Walter C. Taylor IIIGard Hayden Cedric HardwickeColas (as Sir Cedric Hardwicke) Ford RaineyD.A. Thomas Coyle Sidney BlackmerWilliam Lyons Selby Priscilla MorrillVera Finley Joe De SantisColonel William Campbell Barry JonesDwight Hartley Skip HomeierDr. Roy Clinton Grant WilliamsMajor Douglas McKinnon James McCallionDr. Tremaine Jay NovelloProf. Arivello Whit BissellCommanding General Richard TretterRadio Engineer Joseph V. PerryPolice Chief (as Joseph Perry) Don C. HarveyMilitary Commander (as Don Harvey) Mavis Neal PalmerWoman (as Mavis Neal) Clarence LungMaj. Ho Chi-Wong Nancy RennickCarol Selby Conner William Bramley"Baldy" Baldwin Harry EllerbeFinley's Doctor Constance CavendishGert 'the Bread' Evans Martin WolfsonDr. Herschel Clay TannerFred - Duckhunter #1 Hal BokarBert - Duckhunter #2 Lee ZimmerCarl Ford - TV Announcer John ConsidineLt, Bertram Cabot Maxine StuartMrs. McCluskey Karl HeldCapt. Joseph Reardon Jack RaineOld Man (scenes deleted) Joanne GilbertBarbara Scott C. Lindsay WorkmanDr. Anderson Robert BenevidesJames Harrison Barry AtwaterDr. Jonas Temple Bill GunnLt. James P. Willowmore Sasha HardenLt. Esra Krug Lillian AdamsDix's Mother Lisa MannKrug's Governess Gene DarflerWarren Edgar Morley Leslie StevensElection Returns Commentator (voice) (uncredited) / 导演 / 编剧 / 执行制片人 Kenneth PeachDirector Of Photography Conrad HallDirector Of Photography John M. Nickolaus Jr.Director Of Photography Fred J. KoenekampDirector Of Photography Richard K. BrockwaySupervising Film Editor 
