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