Tetsurō Tanba
— Captain Munekata
藤岡弘、
— Geologist Jiro Tate
水谷豊
— Seajacker Munk
Ryōhei Uchida
— Boatswain Nishizawa
Fumio Watanabe
— Reporter Tatsuya Iwado
金井大
— Doctor Hatsuyama
K. Amoha
— Seajacker Simba
Willie Dorsey
— Seajacker Zamba
ケン・サンダース
— Seajacker Kifal
下川辰平
— Chief Steward Terada
Mizuho Suzuki
— Commander of Defense Katsuragi
佐藤慶
— T.V. Director Fukami
Joe Shishido
— Chief Engineer Kosai
Peter Graves
— Elliott Rhoades
Gigi Perreau
— Patricia Haber
Marvin Miller
— Seajacker Simba (voice)
Riley Jackson
— Dr. Hatsuyama (voice)