Shuzo Yoshizumi

Masao Kusakari

President Richardson

Glenn Ford

Doctor Yamauchi

Sonny Chiba

Yasuo Tatsuno

Tsunehiko Watase

Senator Barkley

Robert Vaughn

Nakanishi

Isao Natsuyagi

Captain McCloud - HMS Nereid

Chuck Connors

General Garland

Henry Silva

Sarah Baker

Stephanie Faulkner

Asami Noriko

Yumi Takigawa

Ryuji Sanazawa

Kensaku Morita

Doctor Ed Meyer / Dr. Ed Meyer

Stuart Gillard

Major Carter

Bo Svenson

Marit

Olivia Hussey

Akimasa Matsuo

Toshiyuki Nagashima

Adm. Conway

George Kennedy

Doctor Latour

Cec Linder

Dr. Nakanishi

Isao Natsuki

Prof. Tsuchiya

Ken Ogata

Captain Lopez

Edward James Olmos

Secretary - Palmer Station

Julie Khaner

Col. Rankin

George Touliatos

Radio Operator - Palmer Station

Nicholas Campbell

Dr. Borodinov

Chris Wiggins

Dr. Irma Ollich

Eve Crawford

Major King

John Bayliss

Sailor #1 - HMS Nereid

John Rutter

Sailor #2 - HMS Nereid

Alf Humphreys

Young Sailor - HMS Nereid

Michael Tough

White House Aide Simmons

William Binney

Spy Z

Colin Fox

Dr. Krause

Ken Pogue

Secretary - Palmer Station / American Antarctic Crew Member

Danielle Schneider

Litha (uncredited)

Alberta Watson

Tatsuno Yoshiko

Mitsuko Oka

Doctor's Assistant

Takashi Noguchi

Doctor's Assistant #2

Nenji Kobayashi

Crew Member

Haruki Kadokawa

Crew Member

Chū Takatsuki

Crew Member

Takeshige Hatanaka