Joseph Cotten
Capt. Craig McKenzie / Cmdr. Glenn McKenzie
Cesar Romero
Dr. Malic / Lt. Hastings
Akira Takarada
Dr. Ken Tashiro
Patricia Medina
Lucretia
Masumi Okada
Dr. Jules Masson
Richard Jaeckel
Perry Lawton
Tetsu Nakamura
Dr. Okada
Mari Nakayama
Tsuruko Okada
Akihiko Hirata
Dr. Sugata
Linda Haynes
Dr. Anne Barton
Susumu Kurobe
Chin
Haruo Nakajima
Flying Lion/Giant Rat
Osman Yusuf
Man with Gun (uncredited)
Hikaru Kuroki
Capt. Kroiga
Burr Middleton
Additional Voices (voice)
Wataru Ōmae
Advisor
