Glenn Ford
President Richardson
Acting
Robert Vaughn
Senator Barkley
Acting
Masao Kusakari
Doctor Shûzô Yoshizumi
Acting
Yumi Takigawa
Asami Noriko
Acting
Henry Silva
General Garland
Acting
Bo Svenson
Major Carter
Acting
Stephanie Faulkner
Sarah Baker
Acting
Stuart Gillard
Doctor Ed Meyer
Directing
Cec Linder
Doctor Latour
Acting
Chuck Connors
Captain McCloud - HMS Nereid
Acting
George Kennedy
Admiral Conway
Acting
Olivia Hussey
Marit
Acting
Edward James Olmos
Captain Lopez
Acting
Isao Natsuyagi
Commander Nakanishi
Acting
Julie Khaner
Secretary - Palmer Station
Acting
George Touliatos
Col. Rankin
Acting
Sonny Chiba
Dr. Yamauchi
Acting
Tsunehiko Watase
Yasuo Tatsuno
Acting
Kensaku Morita
Ryûji Sanazawa
Acting
Toshiyuki Nagashima
Akimasa Matsuo
Acting
Nicholas Campbell
Radio Operator - Palmer Station
Acting
Chris Wiggins
Dr. Borodinov
Acting
Eve Crawford
Dr. Irma Ollich
Acting
John Bayliss
Major King
Acting
John Rutter
Sailor #1 - HMS Nereid
Acting
Alf Humphreys
Sailor #2 - HMS Nereid
Acting
Michael Tough
Young Sailor - HMS Nereid
Production
Ken Ogata
Prof. Tsuchiya
Acting
William Binney
White House Aide Simmons
Acting
Stuart Gillard
Dr. Ed Meyer
Directing
Colin Fox
Spy Z
Acting
Ken Pogue
Dr. Krause
Acting
Alberta Watson
Litha (uncredited)
Acting
Danielle Schneider
Secretary - Palmer Station
Acting
Mitsuko Oka
Tatsuno Yoshiko
Acting
Takashi Noguchi
Doctor's Assistant
Acting
Nenji Kobayashi
Doctor's Assistant #2
Acting
Haruki Kadokawa
Crew Member
Production
Chū Takatsuki
Crew Member
Acting
Takeshige Hatanaka
Crew Member
Acting
Chikara Gonoue
Crew Member
Acting
Danielle Schneider
American Antarctic Crew Member
Acting