Kadro (42)
Glenn FordPresident Richardson
Yumi TakigawaAsami Noriko
Robert VaughnSenator Barkley
Masao KusakariDoctor Shûzô Yoshizumi
Henry SilvaGeneral Garland
Bo SvensonMajor CarterStephanie FaulknerSarah Baker
Stuart GillardDoctor Ed Meyer
Cec LinderDoctor Latour
Chuck ConnorsCaptain McCloud - HMS Nereid
George KennedyAdmiral Conway
Olivia HusseyMarit
Edward James OlmosCaptain Lopez
Isao NatsuyagiCommander Nakanishi
Julie KhanerSecretary - Palmer Station
George TouliatosCol. Rankin
Sonny ChibaDr. Yamauchi
Tsunehiko WataseYasuo Tatsuno
Kensaku MoritaRyûji Sanazawa
Toshiyuki NagashimaAkimasa Matsuo
Nicholas CampbellRadio Operator - Palmer Station
Chris WigginsDr. Borodinov
Eve CrawfordDr. Irma OllichJohn BaylissMajor KingJohn RutterSailor #1 - HMS Nereid
Alf HumphreysSailor #2 - HMS Nereid
Michael ToughYoung Sailor - HMS Nereid
Ken OgataProf. Tsuchiya
William BinneyWhite House Aide SimmonsStuart GillardDr. Ed Meyer
Colin FoxSpy Z
Ken PogueDr. Krause
Mitsuko OkaTatsuno Yoshiko
Alberta WatsonLitha (uncredited)
Takashi NoguchiDoctor's AssistantDanielle SchneiderSecretary - Palmer Station
Nenji KobayashiDoctor's Assistant #2
Haruki KadokawaCrew MemberChū TakatsukiCrew MemberTakeshige HatanakaCrew MemberChikara GonoueCrew MemberDanielle SchneiderAmerican Antarctic Crew Member