Gregory PeckCharles Keith David JanssenTed Dougherty James FranciscusClayton Stone Mariette HartleyBetty Lloyd Scott BradyPublic Affairs Officer Frank MarthAir Force Systems Director Craig HuebingFlight Director John CarterFlight Surgeon Vincent Van LynnAerospace Journalist George GaynesMission Director Tom StewartHouston Cap Com Duke HobbieAir Force Titan Specialist Walter BrookeNetwork Commentator Dennis RobertsonLaunch Director Kenner G. KempGuest in Observation Room (uncredited) Frank Capra, Jr.Associate Producer Lyle R. WheelerProduction Design Frank TuttleSet Decoration Daniel L. FappDirector Of Photography W. Wallace KelleySecond Unit Director Of Photography John FrancoScript Supervisor Daniel McCauleyAssistant Director Ralph E. BlackSecond Unit Director William J. O'SullivanProduction Manager 
